How i can calculate row wise avg of an image??

temp1 = double(imread('im1.JPG')); %img1.jpg is a 240*20 pixels in size;

%expected output 240 rows with single column with avg or mean ;

output= mean(temp1,240)

Answer 1

[Thorsten]

 output = mean(temp1, 2);

[Jan]

Exactly. As the documentation of mean explains: The 2nd argument is the dimension to operate on, not the size of this dimension.

[Sohel Ahammed]

I used this code: output=mean(temp1,2); it shows only 20 rows. but my image is 240*20.it should shows 240 rows.

[Stephen23]

mean(temp1,1)

http://www.mathworks.com/help/matlab/ref/mean.html

[Thorsten]

I interpreted 240*20 as row x column; if it is x * y, you can use Stephen's code or simply

 output = mean(temp1);