I am creating gaussian pyramid in MATLAB 2010b. I want to show images like same patterned mentioned here.
I tried to use imresize, truesize         
        
You can use "imshow with True Size for multiple images" FEX file to answer your question...
EDIT : The code below will produce the subplot at the bottom right part of the figure:
clear imagesCellArray
mand = imread('mandelbrot_set.jpg'); % read image
dim = 3;
[imagesCellArray{1:dim,1:dim}] = deal(mand); % create smaller images by imresize
 for iRow = 1:dim
    for iCol = 1:dim
       imagesCellArray{iRow,iCol} = imresize(imagesCellArray{iRow,iCol},1/(1.5*(iCol*iRow)));
    end
 end
 % plot with imshowTruesize - true aspect ratio is preserved
 margins = [25 25];
 Handles = imshowTruesize(imagesCellArray,margins);
 for iRow = 1:dim
    for iCol = 1:dim
       axis(Handles.hSubplot(iRow,iCol),'on')
    end
 end
