how to make cell2mat for many column to one vector ?

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ElizabethR 2016-4-24

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评论： ElizabethR 2016-4-26

采纳的回答： Jan

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

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ElizabethR 2016-4-24

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 ?

Stephen23 2016-4-25

编辑：Stephen23 2016-4-25

@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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Jan 2016-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/280710-how-to-make-cell2mat-for-many-column-to-one-vector#answer_219211

在 MATLAB Online 中打开

Perhaps something like:

V = [b{:, 2:5}]

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ElizabethR 2016-4-24

yes i see, but i mean, is possible that i get the maximum value from complex number ?

ElizabethR 2016-4-26

@Jan Simon how to get all value only from column 2 ?? thanks

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Image Analyst 2016-4-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/280710-how-to-make-cell2mat-for-many-column-to-one-vector#answer_219213

在 MATLAB Online 中打开

Did you try something like this

col5 = nilai{:, 5};
magCol5 = abs(col5);
[maxValue, indexOfMax] = max(magCol5)

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Image Analyst 2016-4-25

Just put it as a line in your program, or type it at the prompt in the command window.

ElizabethR 2016-4-26

编辑：ElizabethR 2016-4-26

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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