pandafulmanda/airquality.csv

## airquality.csv

          
            Ozone
            Solar.R
            Wind
            Temp
            Month
            Day

            
              41
              190
              7.4
              67
              5
              1

            
              36
              118
              8
              72
              5
              2

            
              12
              149
              12.6
              74
              5
              3

            
              18
              313
              11.5
              62
              5
              4

            
              NA
              NA
              14.3
              56
              5
              5

            
              28
              NA
              14.9
              66
              5
              6

            
              23
              299
              8.6
              65
              5
              7

            
              19
              99
              13.8
              59
              5
              8

            
              8
              19
              20.1
              61
              5
              9

            
              NA
              194
              8.6
              69
              5
              10

            
              7
              NA
              6.9
              74
              5
              11

            
              16
              256
              9.7
              69
              5
              12

            
              11
              290
              9.2
              66
              5
              13

            
              14
              274
              10.9
              68
              5
              14

            
              18
              65
              13.2
              58
              5
              15

            
              14
              334
              11.5
              64
              5
              16

            
              34
              307
              12
              66
              5
              17

            
              6
              78
              18.4
              57
              5
              18

            
              30
              322
              11.5
              68
              5
              19

            
              11
              44
              9.7
              62
              5
              20

            
              1
              8
              9.7
              59
              5
              21

            
              11
              320
              16.6
              73
              5
              22

            
              4
              25
              9.7
              61
              5
              23

            
              32
              92
              12
              61
              5
              24

            
              NA
              66
              16.6
              57
              5
              25

            
              NA
              266
              14.9
              58
              5
              26

            
              NA
              NA
              8
              57
              5
              27

            
              23
              13
              12
              67
              5
              28

            
              45
              252
              14.9
              81
              5
              29

            
              115
              223
              5.7
              79
              5
              30

            
              37
              279
              7.4
              76
              5
              31

            
              NA
              286
              8.6
              78
              6
              1

            
              NA
              287
              9.7
              74
              6
              2

            
              NA
              242
              16.1
              67
              6
              3

            
              NA
              186
              9.2
              84
              6
              4

            
              NA
              220
              8.6
              85
              6
              5

            
              NA
              264
              14.3
              79
              6
              6

            
              29
              127
              9.7
              82
              6
              7

            
              NA
              273
              6.9
              87
              6
              8

            
              71
              291
              13.8
              90
              6
              9

            
              39
              323
              11.5
              87
              6
              10

            
              NA
              259
              10.9
              93
              6
              11

            
              NA
              250
              9.2
              92
              6
              12

            
              23
              148
              8
              82
              6
              13

            
              NA
              332
              13.8
              80
              6
              14

            
              NA
              322
              11.5
              79
              6
              15

            
              21
              191
              14.9
              77
              6
              16

            
              37
              284
              20.7
              72
              6
              17

            
              20
              37
              9.2
              65
              6
              18

            
              12
              120
              11.5
              73
              6
              19

            
              13
              137
              10.3
              76
              6
              20

            
              NA
              150
              6.3
              77
              6
              21

            
              NA
              59
              1.7
              76
              6
              22

            
              NA
              91
              4.6
              76
              6
              23

            
              NA
              250
              6.3
              76
              6
              24

            
              NA
              135
              8
              75
              6
              25

            
              NA
              127
              8
              78
              6
              26

            
              NA
              47
              10.3
              73
              6
              27

            
              NA
              98
              11.5
              80
              6
              28

            
              NA
              31
              14.9
              77
              6
              29

            
              NA
              138
              8
              83
              6
              30

            
              135
              269
              4.1
              84
              7
              1

            
              49
              248
              9.2
              85
              7
              2

            
              32
              236
              9.2
              81
              7
              3

            
              NA
              101
              10.9
              84
              7
              4

            
              64
              175
              4.6
              83
              7
              5

            
              40
              314
              10.9
              83
              7
              6

            
              77
              276
              5.1
              88
              7
              7

            
              97
              267
              6.3
              92
              7
              8

            
              97
              272
              5.7
              92
              7
              9

            
              85
              175
              7.4
              89
              7
              10

            
              NA
              139
              8.6
              82
              7
              11

            
              10
              264
              14.3
              73
              7
              12

            
              27
              175
              14.9
              81
              7
              13

            
              NA
              291
              14.9
              91
              7
              14

            
              7
              48
              14.3
              80
              7
              15

            
              48
              260
              6.9
              81
              7
              16

            
              35
              274
              10.3
              82
              7
              17

            
              61
              285
              6.3
              84
              7
              18

            
              79
              187
              5.1
              87
              7
              19

            
              63
              220
              11.5
              85
              7
              20

            
              16
              7
              6.9
              74
              7
              21

            
              NA
              258
              9.7
              81
              7
              22

            
              NA
              295
              11.5
              82
              7
              23

            
              80
              294
              8.6
              86
              7
              24

            
              108
              223
              8
              85
              7
              25

            
              20
              81
              8.6
              82
              7
              26

            
              52
              82
              12
              86
              7
              27

            
              82
              213
              7.4
              88
              7
              28

            
              50
              275
              7.4
              86
              7
              29

            
              64
              253
              7.4
              83
              7
              30

            
              59
              254
              9.2
              81
              7
              31

            
              39
              83
              6.9
              81
              8
              1

            
              9
              24
              13.8
              81
              8
              2

            
              16
              77
              7.4
              82
              8
              3

            
              78
              NA
              6.9
              86
              8
              4

            
              35
              NA
              7.4
              85
              8
              5

            
              66
              NA
              4.6
              87
              8
              6

            
              122
              255
              4
              89
              8
              7

            
              89
              229
              10.3
              90
              8
              8

            
              110
              207
              8
              90
              8
              9

            
              NA
              222
              8.6
              92
              8
              10

            
              NA
              137
              11.5
              86
              8
              11

            
              44
              192
              11.5
              86
              8
              12

            
              28
              273
              11.5
              82
              8
              13

            
              65
              157
              9.7
              80
              8
              14

            
              NA
              64
              11.5
              79
              8
              15

            
              22
              71
              10.3
              77
              8
              16

            
              59
              51
              6.3
              79
              8
              17

            
              23
              115
              7.4
              76
              8
              18

            
              31
              244
              10.9
              78
              8
              19

            
              44
              190
              10.3
              78
              8
              20

            
              21
              259
              15.5
              77
              8
              21

            
              9
              36
              14.3
              72
              8
              22

            
              NA
              255
              12.6
              75
              8
              23

            
              45
              212
              9.7
              79
              8
              24

            
              168
              238
              3.4
              81
              8
              25

            
              73
              215
              8
              86
              8
              26

            
              NA
              153
              5.7
              88
              8
              27

            
              76
              203
              9.7
              97
              8
              28

            
              118
              225
              2.3
              94
              8
              29

            
              84
              237
              6.3
              96
              8
              30

            
              85
              188
              6.3
              94
              8
              31

            
              96
              167
              6.9
              91
              9
              1

            
              78
              197
              5.1
              92
              9
              2

            
              73
              183
              2.8
              93
              9
              3

            
              91
              189
              4.6
              93
              9
              4

            
              47
              95
              7.4
              87
              9
              5

            
              32
              92
              15.5
              84
              9
              6

            
              20
              252
              10.9
              80
              9
              7

            
              23
              220
              10.3
              78
              9
              8

            
              21
              230
              10.9
              75
              9
              9

            
              24
              259
              9.7
              73
              9
              10

            
              44
              236
              14.9
              81
              9
              11

            
              21
              259
              15.5
              76
              9
              12

            
              28
              238
              6.3
              77
              9
              13

            
              9
              24
              10.9
              71
              9
              14

            
              13
              112
              11.5
              71
              9
              15

            
              46
              237
              6.9
              78
              9
              16

            
              18
              224
              13.8
              67
              9
              17

            
              13
              27
              10.3
              76
              9
              18

            
              24
              238
              10.3
              68
              9
              19

            
              16
              201
              8
              82
              9
              20

            
              13
              238
              12.6
              64
              9
              21

            
              23
              14
              9.2
              71
              9
              22

            
              36
              139
              10.3
              81
              9
              23

            
              7
              49
              10.3
              69
              9
              24

            
              14
              20
              16.6
              63
              9
              25

            
              30
              193
              6.9
              70
              9
              26

            
              NA
              145
              13.2
              77
              9
              27

            
              14
              191
              14.3
              75
              9
              28

            
              18
              131
              8
              76
              9
              29

            
              20
              223
              11.5
              68
              9
              30

## csv_head_opencpu
#!/usr/bin/env bash

# use as path_to_bash_script/csv_head_opencpu full_path_to_file

read_csv_session=$(curl https://public.opencpu.org/ocpu/library/utils/R/read.csv -F "file=@$1" | head -n1 | cut -f 4 -d "/")
head_data_session=$(curl https://public.opencpu.org/ocpu/library/utils/R/head -d "x=$read_csv_session" | head -n1 | cut -f 4 -d "/")
curl https://public.opencpu.org/ocpu/tmp/$head_data_session/R/.val/print

## openCPU-attempt.md

      
    Raw
  

              openCPU-attempt.md
            
          
    First, read.csv

the file by posting the file:
curl https://public.opencpu.org/ocpu/library/utils/R/read.csv -F "file=@airquality.csv"

which outputs:
/ocpu/tmp/x0667b22ae7/R/.val
/ocpu/tmp/x0667b22ae7/stdout
/ocpu/tmp/x0667b22ae7/source
/ocpu/tmp/x0667b22ae7/console
/ocpu/tmp/x0667b22ae7/info
/ocpu/tmp/x0667b22ae7/files/airquality.csv
/ocpu/tmp/x0667b22ae7/files/DESCRIPTION

where x0667b22ae7 becomes the session id for our next call.
Then, call head with named parameter x

set to the session id:
curl https://public.opencpu.org/ocpu/library/utils/R/head -d "x=x0667b22ae7"

which outputs:
/ocpu/tmp/x07505e8fc7/R/.val
/ocpu/tmp/x07505e8fc7/stdout
/ocpu/tmp/x07505e8fc7/source
/ocpu/tmp/x07505e8fc7/console
/ocpu/tmp/x07505e8fc7/info
/ocpu/tmp/x07505e8fc7/files/DESCRIPTION

Finally, print the result

of this last session:
curl https://public.opencpu.org/ocpu/tmp/x07505e8fc7/R/.val/print

which outputs:
  Ozone Solar.R Wind Temp Month Day
1    41     190  7.4   67     5   1
2    36     118  8.0   72     5   2
3    12     149 12.6   74     5   3
4    18     313 11.5   62     5   4
5    NA      NA 14.3   56     5   5
6    28      NA 14.9   66     5   6

As a quick script

read_csv_session=$(curl https://public.opencpu.org/ocpu/library/utils/R/read.csv -F "file=@airquality.csv" | head -n1 | cut -f 4 -d "/")

head_data_session=$(curl https://public.opencpu.org/ocpu/library/utils/R/head -d "x=$read_csv_session" | head -n1 | cut -f 4 -d "/")

curl https://public.opencpu.org/ocpu/tmp/$head_data_session/R/.val/print

About

The general pattern is we can call functions at the various endpoints by POSTing named paramaters.
To get what the parameter names should be, we can do do a curl like this:
curl https://public.opencpu.org/ocpu/library/utils/R/head/print

or, we can go to https://public.opencpu.org/ocpu/library/utils/R/head in your browser to see.  If we go to https://public.opencpu.org/ocpu/library/utils/R/, we can see all available functions to call with the utils route. We can see base R functions at https://public.opencpu.org/ocpu/library/base/R/.
The same goes for the base path of any library, such as going to https://public.opencpu.org/ocpu/library/ggplot2/R/, or https://public.opencpu.org/ocpu/library/ggplot2/info/ for the info/help.
See the docs for openCPU here for more about the endpoints.
There are also some cool ways to use the JavaScript library which conveniently wraps making calls to the ocpu endpoints in JavaScript functions.
Ozone	Solar.R	Wind	Temp	Month	Day
41	190	7.4	67	5	1
36	118	8	72	5	2
12	149	12.6	74	5	3
18	313	11.5	62	5	4
NA	NA	14.3	56	5	5
28	NA	14.9	66	5	6
23	299	8.6	65	5	7
19	99	13.8	59	5	8
8	19	20.1	61	5	9
NA	194	8.6	69	5	10
7	NA	6.9	74	5	11
16	256	9.7	69	5	12
11	290	9.2	66	5	13
14	274	10.9	68	5	14
18	65	13.2	58	5	15
14	334	11.5	64	5	16
34	307	12	66	5	17
6	78	18.4	57	5	18
30	322	11.5	68	5	19
11	44	9.7	62	5	20
1	8	9.7	59	5	21
11	320	16.6	73	5	22
4	25	9.7	61	5	23
32	92	12	61	5	24
NA	66	16.6	57	5	25
NA	266	14.9	58	5	26
NA	NA	8	57	5	27
23	13	12	67	5	28
45	252	14.9	81	5	29
115	223	5.7	79	5	30
37	279	7.4	76	5	31
NA	286	8.6	78	6	1
NA	287	9.7	74	6	2
NA	242	16.1	67	6	3
NA	186	9.2	84	6	4
NA	220	8.6	85	6	5
NA	264	14.3	79	6	6
29	127	9.7	82	6	7
NA	273	6.9	87	6	8
71	291	13.8	90	6	9
39	323	11.5	87	6	10
NA	259	10.9	93	6	11
NA	250	9.2	92	6	12
23	148	8	82	6	13
NA	332	13.8	80	6	14
NA	322	11.5	79	6	15
21	191	14.9	77	6	16
37	284	20.7	72	6	17
20	37	9.2	65	6	18
12	120	11.5	73	6	19
13	137	10.3	76	6	20
NA	150	6.3	77	6	21
NA	59	1.7	76	6	22
NA	91	4.6	76	6	23
NA	250	6.3	76	6	24
NA	135	8	75	6	25
NA	127	8	78	6	26
NA	47	10.3	73	6	27
NA	98	11.5	80	6	28
NA	31	14.9	77	6	29
NA	138	8	83	6	30
135	269	4.1	84	7	1
49	248	9.2	85	7	2
32	236	9.2	81	7	3
NA	101	10.9	84	7	4
64	175	4.6	83	7	5
40	314	10.9	83	7	6
77	276	5.1	88	7	7
97	267	6.3	92	7	8
97	272	5.7	92	7	9
85	175	7.4	89	7	10
NA	139	8.6	82	7	11
10	264	14.3	73	7	12
27	175	14.9	81	7	13
NA	291	14.9	91	7	14
7	48	14.3	80	7	15
48	260	6.9	81	7	16
35	274	10.3	82	7	17
61	285	6.3	84	7	18
79	187	5.1	87	7	19
63	220	11.5	85	7	20
16	7	6.9	74	7	21
NA	258	9.7	81	7	22
NA	295	11.5	82	7	23
80	294	8.6	86	7	24
108	223	8	85	7	25
20	81	8.6	82	7	26
52	82	12	86	7	27
82	213	7.4	88	7	28
50	275	7.4	86	7	29
64	253	7.4	83	7	30
59	254	9.2	81	7	31
39	83	6.9	81	8	1
9	24	13.8	81	8	2
16	77	7.4	82	8	3
78	NA	6.9	86	8	4
35	NA	7.4	85	8	5
66	NA	4.6	87	8	6
122	255	4	89	8	7
89	229	10.3	90	8	8
110	207	8	90	8	9
NA	222	8.6	92	8	10
NA	137	11.5	86	8	11
44	192	11.5	86	8	12
28	273	11.5	82	8	13
65	157	9.7	80	8	14
NA	64	11.5	79	8	15
22	71	10.3	77	8	16
59	51	6.3	79	8	17
23	115	7.4	76	8	18
31	244	10.9	78	8	19
44	190	10.3	78	8	20
21	259	15.5	77	8	21
9	36	14.3	72	8	22
NA	255	12.6	75	8	23
45	212	9.7	79	8	24
168	238	3.4	81	8	25
73	215	8	86	8	26
NA	153	5.7	88	8	27
76	203	9.7	97	8	28
118	225	2.3	94	8	29
84	237	6.3	96	8	30
85	188	6.3	94	8	31
96	167	6.9	91	9	1
78	197	5.1	92	9	2
73	183	2.8	93	9	3
91	189	4.6	93	9	4
47	95	7.4	87	9	5
32	92	15.5	84	9	6
20	252	10.9	80	9	7
23	220	10.3	78	9	8
21	230	10.9	75	9	9
24	259	9.7	73	9	10
44	236	14.9	81	9	11
21	259	15.5	76	9	12
28	238	6.3	77	9	13
9	24	10.9	71	9	14
13	112	11.5	71	9	15
46	237	6.9	78	9	16
18	224	13.8	67	9	17
13	27	10.3	76	9	18
24	238	10.3	68	9	19
16	201	8	82	9	20
13	238	12.6	64	9	21
23	14	9.2	71	9	22
36	139	10.3	81	9	23
7	49	10.3	69	9	24
14	20	16.6	63	9	25
30	193	6.9	70	9	26
NA	145	13.2	77	9	27
14	191	14.3	75	9	28
18	131	8	76	9	29
20	223	11.5	68	9	30
	#!/usr/bin/env bash

	# use as path_to_bash_script/csv_head_opencpu full_path_to_file

	read_csv_session=$(curl https://public.opencpu.org/ocpu/library/utils/R/read.csv -F "file=@$1" \| head -n1 \| cut -f 4 -d "/")
	head_data_session=$(curl https://public.opencpu.org/ocpu/library/utils/R/head -d "x=$read_csv_session" \| head -n1 \| cut -f 4 -d "/")
	curl https://public.opencpu.org/ocpu/tmp/$head_data_session/R/.val/print