How can I do an image like this in Matlab?

Here is the image: http://i.imgur.com/23ystyI.png

I got the data in 3 vectors like this:

X Y Intensity

0 1 4

0 2 3

1 0 9

etc

I want to interpolate between the points, to have a continuous plot.

I just need to know the name of that kind of plot please or the name of the command in Matlab, I'll do the code myself.

Thank you very much!

Answer 1

[Star Strider]

From the data you presented, I would use scatteredInterpolant class.

[Miguel Lopes]

But how can i make a plot like the one showing in the picture?

I want the axes to be XY and the color intensity is the intensity.

The scatteredInterpolant seems good to interpolate but how can i plot after that? I want a 2D plot, not 3D. The problem is that I don't know the name of that kind of plot!!

Thank you!

[Star Strider]

I missed that you wanted the sort of plot as well as the interpolation.

I would use contour or its friends. (There are links to similar plots in and at the end of that page.)

[Miguel Lopes]

Ok, thank you! And sorry for being so ignorant!!

I'll try with that!

[Image Analyst]

I'd use scatteredInterpolant, like Star suggested, then use image() or imshow() to display the interpolated image.

[Miguel Lopes]

Hello,

I already did it, thanks!

I didn't need to interpolate because contour does it by itself!

Here it is: http://i.imgur.com/QUt09cc.png

Now i wanted to do a legend like assigning the value of the intensity to a color, can you give me any tips regarding that??

Thanks!

[Star Strider]

My pleasure!

The colour legend won’t look like the one in your Question, but the functions you want are colorbar and colormap.