Plotting and Saving as File in MATLAB

Question

I need to plot and save to image file in MATLAB. Here is the code that I am calling inside a 'for' loop: ``` figure scatter(data_x_pos,data_y_pos,'r*') hold on scatter(data_x_neg,data_y_neg,'b') t = linspace(-80,80); y = -model.w(1)*t/model.w(2); plot(t,y,'k'); % need to save this plot to image to a file here ``` Now, this is starter code that I am using for some work and I don't understand it completely (example - the command 'figure'). There have been suggestions to use saveas or print but I believe I need handles for them. Could someone help me out here? Thanks.

Accepted Answer

`figure()` is a function which returns a handle to the figure:

```
f = figure()
scatter(data_x_pos,data_y_pos,'r*')
...
```

You can then use this handle to save the figure:

```
saveas(f, 'image.png');
```

Take a look at the tutorials on Handle Graphics to learn more.

`scatter`, and `plot` also return handles to the collection of points, or the lines, or whatever, they've plotted.

Plotting and Saving as File in MATLAB

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