How to run a program on an csv file data in batches
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Tino on 17 Jun 2019
Commented: Walter Roberson on 20 Jun 2019
I am trying to import data from csv file with size (1046520 1). Using the importdata function.
K = load('caamel.csv');
It is taking over an hour to compute my program.
How do I run my code on the excel file in batches instead of one whole data which is taking forever to see result
I will appreciate your help
Walter Roberson on 20 Jun 2019
You implied that the reason that your code is taking so long is that import (but really load) is slow. I showed timing on a file 50 times larger than yours could take about 20 minutes to load() so your file would take about half a minute to load(). If you were to switch to textscan then it should take roughly 250/50 = 5 seconds. At that point you might as well read in all the data and loop over portions of it.
textscan also permits you to to specify a count to read, if you find that easier than loading everything and looping indexing.
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