Getting a ' Undefined function 'mtimes' for input arguments of type 'cells' ' error

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Michael 2014-3-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/120582-getting-a-undefined-function-mtimes-for-input-arguments-of-type-cells-error

评论： KRUNAL 2014-8-6

Im completely new to matlab and I've got a problem that undoubtedly has a simple solution, but its beyond me at the moment, can anyone help?

function [m, s1, s2] = Pop_up_test()
answer = inputdlg({'mass', 'spring constant 1', 'spring constant 2'},'parameters',1);
m = answer(1);
disp(m);
F = m * 9.8;
disp(F)

I get the error in the 5th line where I calculate the force

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Answer 1

Mischa Kim 2014-3-7

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https://ww2.mathworks.cn/matlabcentral/answers/120582-getting-a-undefined-function-mtimes-for-input-arguments-of-type-cells-error#answer_127433

编辑：Mischa Kim 2014-3-7

在 MATLAB Online 中打开

Michael, use

m = str2num(answer{1});

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Alagesan 2014-3-17

How to understand this arguments with simple coding??

see matrix W is the adjacency model

so that if you have n variables V={v1 ... vn} then: V=V*W

therefore:

v1={0 v2 v3 v4 ... vn} * W(:,1) which is the first column in W v2={v1 0 v3 v4 ... vn} * W(:,2) which is the second column in W ... vn={v1 v2 v3 v4 ... vn-1 0} * W(:,n) being the nth column in W

KRUNAL 2014-8-6

在 MATLAB Online 中打开

I have my data as

filename is 'ofile.xlsx' that contains the following data :

 Year  Month  Day
 06     11
 05     10
 07     15

I am trying to do this

......

....

 datecol1 = ofile(:,3)
 datecol2 = ofile(:,4)
 datecol3 = ofile(:,2)
 datecol = datecol1*1000000 + datecol2*10000 + datecol3;
 datestr(datecol,'mm/dd/yyyy')

But it does not give output as