Failed on converting date string to date number

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Samer Husam
Samer Husam 2012-7-28
hi all,
I have this code that I need to plot date data time vs power from excel, my code is as follow:
[num,T,vT] = xlsread('excel.xls','Sheet1'); %excel file
x = T(:,1); % Time column
y = num(:,4); % power column
% x1=datenum(0,0,0,0,x,0);
x1=datenum(x,'HH:MM');
plot(handles.axes,x1,y)
but I am getting this error:
??? DATENUM failed. Error using ==> dtstr2dtnummx Failed on converting date string to date number.
so how can I overcome this problem ??? please help..
Sam

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回答（1 个）

Walter Roberson
Walter Roberson 2012-7-28
One or more of the times being input does not have the expected format.
for K = 1 : length(x)
try
x1 = datenum(x{K}, 'HH:MM');
catch
fprintf('Entry #%d is not valid, is |%s|\n', K, x{K});
end
end
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Walter Roberson
Walter Roberson 2012-7-29
http://www.mathworks.com/help/techdoc/ref/size.html
d = size(X) returns the sizes of each dimension of array X in a vector d with ndims(X) elements. If X is a scalar, which MATLAB software regards as a 1-by-1 array, size(X) returns the vector [1 1].

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