Ryan Hill ryan-hill
ryan-hill
/ Lookup.R
Created
October 1, 2015 19:10
— forked from mhweber/Lookup.R
This code takes a lookup table and applies it to a data frame, updating only values for records that occur in the lookup table using indexing and match
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| # Create data frame 1 | |
| x = c("ID1","ID2","ID3","ID4","ID5") | |
| y = c("C1","C2","C3","C4","C5") | |
| d1 = data.frame("SiteID" = x, "Value" = y) | |
| d1 | |
| # Create lookup table | |
| x = c("ID2","ID5") | |
| y = c("C5","C2") | |
| lookup = data.frame("SiteID" = x, "Value" = y) | |
| lookup |
ryan-hill
/ float2int.py
Created
October 14, 2015 00:35
— forked from bryanluman/float2int.py
Converting a large DEM with rasterio
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| import numpy as np | |
| import rasterio | |
| """ | |
| 2014-02-13 | |
| Bryan Luman | |
| Use it however you like at your own risk | |
| Problem: | |
| I have a huge DEM converted from LiDAR LAS points. I'd like to make it slightly |
ryan-hill
/ walk_up.py
Created
October 19, 2017 16:50
— forked from debboutr/walk_up.py
recursive function to walk up flow table. NOTE: this will not handle braided flowlines!
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| from StreamCat_functions import dbf2DF | |
| pre = 'D:/NHDPlusV21/NHDPlusGL/NHDPlus04' | |
| fline = dbf2DF('D%s/NHDSnapshot/Hydrography/NHDFlowline.dbf' % pre) | |
| flow = dbf2DF('%s/NHDPlusAttributes/PlusFlow.dbf' pre)[['TOCOMID','FROMCOMID']] | |
| def recurs(val, ups): | |
| print val | |
| ups = ups + flow.ix[flow.TOCOMID == val].FROMCOMID.tolist() | |
| if 0 in ups: |