TysonRayJones/C_MMA_Assoc_Builder.md

## C_MMA_Assoc_Builder.md

      
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              C_MMA_Assoc_Builder.md
            
          
    Generate Mathematica Associations in C

Get the code here.
The header file
#include "mmaformatter.h"
provides functions for converting C data structures to strings of Mathematica objects, and producing
files which Mathematica can read through Get as an association.
For example,
int length = 5;
int degits = 2;  // digits after decimal in scientific notation
double data[5] = {1.013, 10.331, .59102, 5.0, 6.0};
	
FILE* file = openAssocWrite("assoc.txt");
writeStringToAssoc(file, "patient", "Tyson");
writeIntToAssoc(file, "trial", 112);
writeDoubleArrToAssoc(file, "conductivity", data, length, digits);
closeAssocWrite(file);
produces a file "assoc.txt" with contents
<|
"patient" -> "Tyson",
"trial" -> 112,
"conductivity" -> {1.01*10^+00, 1.03*10^+01, 5.91*10^-01, 5.00*10^+00, 6.00*10^+00}
|>

which can then be read into Mathematica via
SetDirectory @ NotebookDirectory[];
assoc = Get["assoc.txt"]

ListLinePlot @ assoc["conductivity"]
which produces the very-terrific graph