MATLAB Answers


use workspace variables as input to generate multiple text file outputs

Asked by Charles on 4 May 2019
Latest activity Commented on by Charles on 6 May 2019
Accepted Answer by Jan
I have n workspace variables which all happen to be tables. The following script takes one such variable for example GPB_USD as input. It does a numnber of operations
but eventually generates a text file output with name GBPUSD1d.
The rexr file contain three columns, A colum of dates, and two columns of prices.
I wish to generate text files for each of the tables in the workspace and name them appropriately as .txt files. \
For example USD_CHF, should produce a textfile USDCHF1d etc
cd '/Users/cg/Documents/MATLAB/code 7/Selection'
tst=USD_NOK.Date(1:height(USD_NOK(2:end,2))); % just a sample set to play with
mydates = datetime(tst,'InputFormat','yyyy-MM-dd''T''HH:mm:ss.SSSSSSSSSZ ', ...
% size(AUDCAD)
USD_NOK1d = horzcat(num2cell(mydates), USD_NOK(2:end,5));
USD_NOK1d.New=USD_NOK1d.Close; % make a new column with content of close
cd '/Users/cg/Forex-and-Stock-Python-Pattern-Recognizer-master/data'
writetable(USD_NOK1d,'USD_NOK1d','WriteVariableNames',0) % write a text file without header ...


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1 Answer

Answer by Jan
on 6 May 2019
 Accepted Answer

Data = load('INPUTFILE.mat');
DataName = fieldnames(Data);
for k = 1:numel(DataName)
ThisName = DataName{k};
ThisData = Data.(ThisName);
...your code using the current values
OutputName = [strrep(ThisName, '_', ''), '1d'];


Thank you for this. I am reading through each line. What I understand is
load input data, which will be some 76 table arrays
assign field names to the variable data
then loop: for through each field name, and assing it to variable name ThisName, then also assign data from each table to ThisData
my code using the value for GhiusName and ThisData will produce each text file
Output will name the resultant text file.
I am thinking there is more than one feild name per file, however lets run the code and see.
Perfect. I change the order of one line in the cod eit it works. Thank you so much

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