How to obtain data in a matrix from fig.file?

Hi,

A colleague gave a fig. file which is a 2D matrix with a scale color from 0 to 255. He plotted the data, saved them in a fig file a sent to me. I would like to suf the data and for that I need to extract the data. I am using for that this code:

openfig('figure.fig')
h = gcf;
axesObjs = h.Children;
dataObjs = axesObjs.Children;
data = dataObjs.CDataMapping; 

But I got the error

No appropriate method, property, or field 'CDataMapping' for class 'matlab.graphics.GraphicsPlaceholder'.

What is wrong?

Answer 1

[Star Strider]

The ‘Children’ propertiy disappeared with the introduction of ‘HG2’ (handle graphics version 2) in R2014b.

You most likely need to use the findobj (link) function.

Example —

figure
surf(rand(10))
h = gca;
srf = findobj(h,'Type','Surface');
X = srf.XData;
Y = srf.YData;
Z = srf.ZData;

That should return all the data you want. To see all the fields in the ‘srf’ structure, use:

sp = get(srf)

to display them.