MATLAB: How to change the width of an image without changing the height

Question

Somehow my current code in MATLAB won't work, a part of which requires me to change the width of a transformed image by given amount keeping the height constant, can anyone help with it ? thanks!

load('ruler2.txt');
load('rulertran2.txt');
x=ruler2(1:52,1);
y=ruler2(1:52,2);
xtran=rulertran2(1:52,1);
ytran=rulertran2(1:52,2);
Tform=cp2tform([x y],[xtran ytran],'projective');
im=imread('TDB_17_1_Subside_1171.jpg'); 
imshow(im)

^^ first I wrote the above to do a pixel coordinate transformation on my image, however it needs a little more improvement so I need to decrease the width of this transformed image and below is what I did but I am not certain if that's the right way to do it, I know resize function won't work for just width or height 🙁

xim=imtransform(im,Tform);
im=imread('xim');
info=iminfo('xim');
hoyde=info.height;
bredde=info.width; 
nyhoyde=hoyde;
nybredde=bredde/10;
[nyhoyde, nybredde, kanaler]=size(im);

Answer 1

Try this:

[rows, columns, numberOfColorChannels] = size(yourImage);
newImage = imresize(yourImage, [rows, newColumns]);