MATLAB Answers

How to solve: Error using "csvread". Too many output arguments

14 views (last 30 days)
Gagan Bansal
Gagan Bansal on 30 Jan 2019
Answered: Jeremy Hughes on 30 Jan 2019
I want to read 40 .csv files. In every csv file there are 251 rows and 4 columns. it is showing error:
Error using csvread
Too many output arguments.
Error in readingALLcsvFILES (line 8)
[num,txt,raw{k}] = csvread(myfilename); %reading the execel file
This is my code:
clear all
numfiles = input('Enter no. of files'); %entering no. of files to be calculated
mydata = cell(1, numfiles); %creating a cell array for all the files
for k = 1:numfiles %begin of loop for each file calculation
myfilename = sprintf('DAT0000%d.csv', k-1); %calling the excel file
[num,txt,raw{k}] = csvread(myfilename); %reading the execel file
n{k}=raw{k}(1,1); % Giving weld time in a cell array of 1x1
n{k}=cell2mat(n{k}); % converting n into a matrix value
DCRfile{k} = raw{k}(2:(n{k}+1),:); % creating a cell array for DCR with time, cuurent and voltage value
DCRfile{k}(:,2)=[]; % deleting 2nd column with value '*'
DCRfile{k}=string(DCRfile{k}); % convering DCR cell array to ta string array
DCRfile{k}(:,1)=erase(DCRfile{k}(:,1),'ms'); % erasing units in DCR string array
DCRfile{k}(:,2)=erase(DCRfile{k}(:,2),'kA');
DCRfile{k}(:,3)=erase(DCRfile{k}(:,3),'V');
DCRfile{k}=double(DCRfile{k}); % converting string array to a numeric array
%Calculation of DCR
for i = 1:n{k}
DCR{k}(i) = (DCRfile{k}(i,3))/(DCRfile{k}(i,2))*1000;
end
%Calculation of R(min) and Time at R(min)
[Rmin{k},Tmin{k}] = min(DCR{k});
%Calculation of Beta Peak
Rmax{k} = 0;
for i = Tmin{k}:n{k}
% DCRx(i-Tmin+1)=DCR(i);
if Rmax{k} < DCR{k}(i)
Rmax{k} = DCR{k}(i);
end
end
Beta{k} = Rmax{k};
Tmax{k} = find(DCR{k}==Beta{k}); %Time at Beta Peak
%Mean DCR
DCRmean{k}=sum(DCR{k})/n{k};
%Calculation of Heat Input
for i = 1:n{k}
HI{k}(i) = DCRfile{k}(i,2)*DCRfile{k}(i,2)*DCR{k}(i)/1000;
end
THI{k}=sum(HI{k}); %Total Heat Input
end

  8 Comments

Show 5 older comments
madhan ravi
madhan ravi on 30 Jan 2019
Why do you need three outputs? you seem to be using only the numeric datas right?
Gagan Bansal
Gagan Bansal on 30 Jan 2019
Yes. my csv file is like:
250
1ms 1kA 10V
2ms 2.2kA 3V
3ms 3.6kA 5.4V
. . .
. . .
. . .
250ms 3.1kA 5.12V
I only need
250
1 1 10
2 2.2 3
3 3.6 5.4
. . .
. . .
. . .
250 3.1 5.12
madhan ravi
madhan ravi on 30 Jan 2019
Well it had already been answered in your previous question so take a moment to read the answers in your previous question!

Sign in to comment.

Answers (2)

Jeremy Hughes
Jeremy Hughes on 30 Jan 2019
If you have both text and numeric data, I suggest you try READTABLE instead.

  0 Comments

Sign in to comment.


M
M on 30 Jan 2019
As the error says, you are requesting two many outputs arguments.
The function 'csvread' only returns one output.

  1 Comment

Gagan Bansal
Gagan Bansal on 30 Jan 2019
Is there any way to use csv file for multiple outputs.

Sign in to comment.