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how to make cell2mat for many column to one vector ?

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ElizabethR
ElizabethR on 24 Apr 2016
Commented: ElizabethR on 26 Apr 2016
i have a cell like this image
i want to get the maximum value from valeu of column 2 to 5. when i using cell2mat function, i get the error. so, how to convert the value of column 2 to 5 to be vector so i can get the maximum value ? thanks

  3 Comments

Jan
Jan on 24 Apr 2016
You show us the contents of "data" and a variable "a.nilai". The error message means, that "a.nilai{2,1}" is not a cell. But how could we know which variable you want to process? And what do you assume to be the "maximum" of a list of complex values?
ElizabethR
ElizabethR on 24 Apr 2016
Thanks for answare,
ooh i am sorry, this is the right image:
the variable i want process is "nilai" .. yes, i want to get the maximum value from value in column to 5 is it possible that i get the maximum from complex values ?
Stephen Cobeldick
Stephen Cobeldick on 25 Apr 2016
@eliz: instead of asking random strangers why not just simply read the MATLAB documentation max, and see what it says about complex numbers. The documentation is great: it tells us how MATLAB works.

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Accepted Answer

Jan
Jan on 24 Apr 2016
Perhaps something like:
V = [b{:, 2:5}]

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ElizabethR
ElizabethR on 24 Apr 2016
yes i see, but i mean, is possible that i get the maximum value from complex number ?
ElizabethR
ElizabethR on 26 Apr 2016
@Jan Simon how to get all value only from column 2 ?? thanks

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More Answers (1)

Image Analyst
Image Analyst on 24 Apr 2016
Did you try something like this
col5 = nilai{:, 5};
magCol5 = abs(col5);
[maxValue, indexOfMax] = max(magCol5)

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Image Analyst
Image Analyst on 25 Apr 2016
Just put it as a line in your program, or type it at the prompt in the command window.
ElizabethR
ElizabethR on 26 Apr 2016
i have been tried it. thanks yo so much image analyst ^^ whether the format long g convert a decimal number with lots value after the comma to only 14 number after the comma?? i try to using format long g in my function, but this output is same like i don't use format long g thanks

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