CODEWITHSUNDEEP
matlab
Léo Léopold Hertz 준영
Léo Léopold Hertz 준영

Reputation: 141340

Processing loaded Matlab figure data in the workspace

I followed the instructions here. I have data in the fig -file:

enter image description here

I run

s = load('filename.fig','-mat');

I get many fields of data:

enter image description here

I would like to get data only in the range from -1.5 to 2 in a list.

How can you retrieve data from such a Matlab data-structure?

Upvotes: 1

Views: 555

Answers (1)

chappjc
chappjc

Reputation: 30589

I hinted at this process in my previous answer to a different question. As you know, .fig files are actually MAT-files that contain data which specifies the figure. To load the .fig data into a MATLAB struct and then access the XData and YData properties of a specific axes and series (you can have multiple axes and series):

>> s = load('filename.fig','-mat');
s = 
    hgS_070000: [1x1 struct]
>> axesNum = 1; seriesNum = 1;
>> series = s.hgS_070000.children(axesNum).children(seriesNum)
series = 
          type: 'graph2d.lineseries'
        handle: 172.0051
    properties: [1x1 struct]
      children: []
       special: []
>> XData = series.properties.XData;
>> YData = series.properties.YData;

Now you just have to grab the samples you want:

rangeMask = YData >= -1.5 & YData <= 2;
YDataSub = YData(rangeMask);
XDataSub = XData(rangeMask);

See also this examination of the .fig file format, for a simplified example with only one axis and one series, thus not using any axesNum and seriesNum indexes.

Upvotes: 1

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