MATLAB Answers

Extracting Unknown Amount of Columns from Excel Data

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Boegs on 19 Apr 2019
Commented: Boegs on 22 Apr 2019
So I am trying to sort datasheets I'm given in excel into rows of 7 columns. And the datasheet I am given could have any amount of columns for any row. So I was hoping for some help.
This is what I have so far, but it can only handle up to column Y in excel. I want to be able to write something that can handle any amount of columns, just given the input file.
L = length(xlsread('Input')); %number of rows
N = 7; %desired number of columns
X = NaN(1,7); %first reorganized row is empty
for i=1:L %reads all input rows
xlRange = sprintf('A%d:Y%d',i,i); %range of columns from A to Y
A = xlsread('Input',xlRange); %brings in input data one row at a time
Z = reshape([A(:);nan(mod(-numel(A),N),1)],N,{}); %shapes the data into rows of 7
Z = Z.'; %switches rows for columns
X = cat(1,X,Z); %desired output in a matrix
xlswrite('Output',X) %prints to excel sheec

Answers (1)

Jeremy Hughes
Jeremy Hughes on 19 Apr 2019
I recommend using READMATRIX if you have access to R2019a, or READTABLE for earlier releases.
A = readmatrix(filename)
Once you have the matrix in MATLAB, you can loop over the rows of the data for processing.
Boegs on 22 Apr 2019
So the data I recieve is in the format of the "Pre-Code Data" excel file.
And what I want matlab to make it look like is in the format of the "Post-Code Data" excel file.
But the columns I recieve can vary and so can the amount of rows. So I was hoping to create something to be able to format my data no matter the amount of rows or columns.

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