I have "NewCell" that's a cell with 1 row and 6 columns; in which column, there is another cell with 1 column and "k" rows. If the row "k" in NewCell (1,1) is 0, I want to know the average from values in another file (Preos2013S1)
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Eduardo Rocha
am 7 Nov. 2016
Kommentiert: Eduardo Rocha
am 7 Nov. 2016
sum=0;
i=0;
for k=0:size(Preos2013S1)
if NewCell{1,1} == 0
sum=sum+Preos2013S1(k,6);
i=i+1;
end
end
mediacons_0=sum/i;
histogram(mediacons_0)
It does not work because Undefined operator '==' for input arguments of type 'cell'. What do I need to change?
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Akzeptierte Antwort
Walter Roberson
am 7 Nov. 2016
It is firmly recommended that you do not use sum as the name of a variable, as that interferes with using the important sum function. That tends to lead to bugs, and confuses other people reading the code.
You should never use size() with a single parameter as one of the input parameters to the colon operator (":") because the colon operator is only defined when the parameters are scalars but size() with only a single parameter always returns a function. You should either use length() or use size() with two inputs to indicate which dimension you are taking the size of.
You are iterating over a size, but you are starting from 0 instead of 1. That is likely to lead you to either indexing at 0 or indexing out of bounds.
Your test should be
if NewCell{1,1}{k} == 0
3 Kommentare
Walter Roberson
am 7 Nov. 2016
As I wrote above,
"You are iterating over a size, but you are starting from 0 instead of 1. That is likely to lead you to either indexing at 0 or indexing out of bounds."
0 is not a valid index in MATLAB; why are you trying to use it to index Preos2013S1 ?
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