Put data from user in matrix with loop in matlab

Question

I'm new in matlab, I've searched a lot but I didn't find my answer. I want to get data from user in a for loop and put that data in matrix. I used this code:

npattern=inputdlg('Enter the number of Patterns');
a=npattern(1,1);
for i=1 : a(1,1);
    r=inputdlg('Enter Data');
    end
end

But it doesn't work for me. What should I do now?

What doesn`t work exactly? What do you expect?

Luis Mendo
– Luis Mendo

2013-11-05 17:41:14 +00:00
Commented Nov 5, 2013 at 17:41 — Luis Mendo
– Luis Mendo, Commented Nov 5, 2013 at 17:41

Luis Mendo · Accepted Answer · 2013-11-05 17:46:16Z

2

Assuming your r can contain strings (not just numbers):

npattern=inputdlg('Enter the number of Patterns');
a=str2num(npattern{1});
for ii=1:a;
    r{ii}=inputdlg('Enter Data');
end

Comments:

inputdlg returns a cell array of strings
it's bet not to use i as a variable (i is sqrt(-1) by default)
r in your code is overwritten at each iteration. Better use a cell array
there is one end too many

answered Nov 5, 2013 at 17:46

Luis Mendo

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Comments

Franck Dernoncourt · Accepted Answer · 2013-11-05 17:43:59Z

1

x=inputdlg('Enter the number of Patterns');
data = str2num(x{:}); 
r = zeros(data, 1);
for i=1:data
    x = inputdlg('Enter Data');
    r(i, 1) = str2num(x{:});
end

answered Nov 5, 2013 at 17:43

Franck Dernoncourt

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2 Comments

Luis Mendo Over a year ago

Not sure it can be assumed that the second inputdlg should accept a single number (at each iteration).

Franck Dernoncourt Over a year ago

Partial question, partial answer :)

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