Summation of Array help!

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Hanif
Hanif 2013-7-11
I have an array and I'd like to sum up very specific data. Background info, the array is an image and I would like to display an image which is a summation of a few frames
my data is stored like such:
a = data{1}(:,:,1,:15) % This displays the first image in the 15th frame.
imagesc(1)
I would like to display the first image with a summation of the first to fourth frame but when I try I get errors
example:
sum(data{1}(:,:,1,1:4)); imagesc(a)
the error obtained is:
Error using image Indexed CData must be size [MxN], TrueColor CData must be size [MxNx3]
Error in imagesc (line 19) hh = image(varargin{1},'CDataMapping','scaled');
Error in Summation (line 5) imagesc(a)
What does this mean, and how can I fix it !?

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Matt J
Matt J 2013-7-11
sum(data{1}(:,:,1,1:4) ,4 );
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Matt J
Matt J 2013-7-11
You're summing along the 4th dimension of your frame data.

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