image and imwrite colormap problem

Hello! I need to generate an image from matrix (like fluid jet) and save it as a picture. At the moment I use

mesh(dlmread(my_data.txt))

Then I choose X-Y projection and save it as a picture. It's is very cumbersome but colormap is applied correctly, 'Color data min' and 'Color data max' are set to appropriate min and max values of my data array.

But if I use image(dlmread(my_data.txt)) imwrite - colormap is set to default [0 1] (even though in colormap editor correct min max values displayed). How do I re-scale colormap for range of values in my data? Thank you in advance!

[Image Analyst]

Can you give a short script demonstrating what you have so we can reproduce it?

[Nikita Tarasov]

Hello,

I've managed to make imwrite to save picture as grey image, still have problems with colormaps. That's what I'm trying to do:

    min110=min(min(wave110.mat));
    max110=max(max(wave110.mat));
    img110=(wave110.mat-min110)./(max110-min110);
    mapTrace=colormap(jet(256));
    imwrite(img110,mapTrace,'110.tiff','tiff');

Where wave110.mat - matrix MxN. This code gives me blue (in case of 'jet' and red in case of 'hsv') picture. I've tried to cast img110 to uint8, uint16 - no luck.