My function calls code from other functions I did not write those but I know what they do. One of them is .p Matlab file with obfuscated content.
I am doing batch processing of a number of files. I want to write the figures directly to file without display. So I can go through them separately.
Any ideas on how to achieve this.
Thanks!
Script to save matlab figures to a specified directory
The above link works but I still want to avoid displaying the figures at all. Directly print to file. But the work around can simply close all open figures after that loop.
In your script, as soon as you create the figure, set its visibility to off.
For example:
figure(28732);
set(28732,'visible','off'); %Now the figure is not shown
You can now work with the figure, plot, save etc, without the visual clutter or system overhead of displaying it.
If you want ALL of your figures to start without visibility, you can set the default property, as follows:
set(0,'DefaultFigureVisible','off').
This will cause all generated figures to be generated without visibility. (Note, this will be very confusing is you forget that this property is set.)
You should still close the figure as soon as possible in the script, as a part of good memory management.
Related
I have made a Gui program that I compile to EXE application which lots csv file into graph data. I buit a save button but I do not know how save figure with different name each time cause (savefig anduisave both uses matlab program). I am posting my code below if anyoff you guys figure out how to save gui figue into image or anything that does require matlab to open. Last function is the callback function for save button.
function ma_Callback(hObject, eventdata, handles)
% i tried uisave but not possible to run computer without matlab cause mcr
% does not run uisave
% i tried copyopbj but since i did not put a name on my figure it did not
% work
%savefig
If you are trying to save a kind of image from your figure, then the best option which supports many aspects, is using print function.
I have already done this in a compiled app and it works perfect. Using print function you can set different file type(vector formats like *.svg are also supported), resolution(dpi), and so many others.
Although you can use print function directly on the figure, but I found that the best way (More Customization like removing or adding some objects and changing many options) is to follow this steps:
Create another figure with Visible='on' but a position that is out of screen with the same width and height of Main Figure.
normalized position = [-1, -1, ?, ?]. (Create this figure in start up and don't destroy it until your app exits, let call it Print Figure).
Copy your figure content (or the parts you are interested in) using copyobj to that figure (you may need to set Parent property of some key objects like panels to this new figure). They would look exactly as they look in the main figure, because they have the same properties. you can add or remove some objects in this step.
Change aspect ratio of "Print Figure" for a better output.
Print this figure with all options (file format, dpi, ...) you need. in my own GUI i allowed the user to change this settings with an input dialog.
In my app i used functions like winopen to show the output, and output directory to the user, when the print task was done. Print process takes some time, specially if dpi is huge, so it is also a good idea to inactivate buttons and show wait cursor.
Update:
a simple usage would be:
print(MainFigure, 'myFileName', '-dpng', '-r300')
I want to edit a certain property of MATLAB figures saved as .fig (MATLAB's default format) files.
I create a lot of graphics-intensive figures in a script, so I choose not to display them by making the default figure invisible with set(0,'DefaultFigureVisible','off'). This sets the 'Visible' property of any new figure to 'off'. This way I can create, edit, save, etc., figures without the need to draw them, which can be taxing on CPU, GPU and their memories. I save the figures as .fig files using the saveas(handle,'filename.fig') command. This also saves the 'Visible' property, which is a problem when I do want to open the figure (e.g. by double-clicking the file in my Windows Explorer). It loads the figure, but it doesn't display it because its 'Visible' property is set to 'off'.
I want all .fig files to be saved with the property set to 'on', but how can I achieve this without displaying (= taxing) the figures? The moment I use set(handle,'Visible','on'), the figure is drawn.
So basically, I want to edit the file on a lower level than when it's loaded as a figure in MATLAB.
I think it could be done as follows, but I do not know exactly how to achieve it. One can load the .fig's data as if it were a .mat file using s=load('filename.fig','-mat');. This loads a structure s containing some fields that contain all the figure's data, properties, etc. Now, the figure handle must be found in this unkown structure and the 'Visible' property that goes along with the handle edited.
Can this be done without the figure being drawn?
I tried, but haven't succeeded, using fopen, fread and their friends.
Does anybody know how to do what I want to do?
I base my solution on the thread from the url posted by user4506754: http://www.mathworks.com/matlabcentral/newsreader/view_thread/306249
There, Jesse Hopkins posts (post 15) that you can edit a property 'ResizeFcn' to execute a function when MATLAB creates a figure. This doesn't work on my MATLAB installation, but lead me to look into the different functions you can attach to a figure in its properties. This page documents all figure properties: http://mathworks.com/help/matlab/ref/figure-properties.html. There I found the 'CreateFcn' property. Its description contains:
This property specifies a callback function to execute when MATLAB creates the figure. MATLAB initializes all figure property values before executing the CreateFcn callback.
It means that the figure is loaded with its properties, including the 'Visible' property being 'off' and then 'CreateFcn' is called.
Setting 'CreateFcn' to make the figure visible then solves my problem.
set(gcf,'CreateFcn','set(gcf,''Visible'',''on'')')
An example:
ezplot(#sin) % draw a simple figure containing a sine wave, title, etc.
set(gcf,'Visible','off','CreateFcn','set(gcf,''Visible'',''on'')' % this disables the figure and set the 'CreateFcn' property simultaneously
saveas(gcf,'sin.fig') % save the figure in the current folder as a .fig file
close % closes current figure
Now go to the current folder in your Explorer and double-click the sin.fig file. It makes MATLAB load it and, poof, the figure is drawn.
Solution found.
This doesn't edit the .fig file, as I originally asked (as a solution), but it is an alternative solution to the original problem. Now I can create and save figures without them being visible, but draw the figures the moment they're loaded by MATLAB.
So I'm working on some simple neural network problems for a class I'm taking, and I've mostly done all of the work.
However, I'd like to be able to press run and have all of the relevant figures and graphs pop out so I can easily show my work.
To do this I've been drawing setting the names of figures that I plot in using the
figure('Name', 'NameGoesHere', 'NumberTitle', 'off')`
variant of the figure function.
The thing is, one of the things that I have to show are performance graphs for the different networks I made, and using plotperform(tr) sets the window name to Performace (plotperform) even if I try setting the figure name to something else. Any help?
Here's a picture showing what I mean:
Oh, and, being really new to Matlab, correct me if I'm wrong, but since performance is defined as mean absolute error, the lower it is, the better right? So is there a way to set is so plotperform actually selects the lowest point of the graph as the best instead of the first one?
Another thing I'd like to be able to do is have the training information nntraintool open in a new window every time I call the train(netA, P, T) function. Right now, every time it's called it just overwrites the previous info in the nntraintool window. Is it even possible to do this?
This is the window I'm talking about:
In matlab, I have created a GUI with several plots and edit boxes filled with text for an experiment with the bike. These plots and edit box values vary depending on the data I input (120 different sets). I was able to save the GUI as a figure with
saveas(handles.speedbike,fullfile(savename), 'fig');
Speedbike is the handle I gave to one of the plots and savename is the name that the figure is saved under, which changes with each set.
Now I also wish to save all the sepparate GUI's as jpegs, but using the same code as above, but with 'jpg' instead of 'fig' only saves a small corner of the figure as a jpeg, not the whole GUI.
Is there any function that I can use to correctly save a gui as a jpeg, or any way to open a .fig file, and then saving a copy of that as a jpeg.?
You need to use the handle of the whole figure for your GUI, instead of the handle of one of the plots. You probably also want to use print for saving to jpg.
Ive found satisfactory results with this:
hg=get(0,'Children');
saveas(hg,'.\gui.fig','fig');
optsave.Format='png';
hgexport(hg,'.\gui.png',optsave);
Why this do not work?. This normally do with normal figures, and failed with GUI's:
optsave.Format='meta';
hgexport(hg,'.\gui.wmf',optsave);
Is there any way to print the figure to the clipboard so that the quality is identical to what the Edit-->Copy Figure option provides?
I used to save the figure to powerpoint file by using saveppt.m obtained from Matlab Central. It worked well until yesterday. I noticed that the stored image quality was somehow degraded. I tried to re-generate some ppt slides with exactly the same script and the same source data, but the new slides are simply of worse quality.
I investigated into this problem a little bit and discovered that when the figure is copied to clipboard by running print -dmeta, the image in the clipboard is already degraded, while if I use the Edit-->Copy Figure option in the figure window, I get the image as clear as the original image in the figure window.
Following is an example for your reference. I copied the image from a figure to the clipboard by two different methods, and paste it to Microsoft Paint program, and cut a piece of it to show below:
The image using print -dmeta:
The image using Edit-->Copy Figure:
If you compare the Xtick label '50', you may see that the image from Edit-->Copy Figure is smoother.
At the beginning I thought it was a problem of the resolution, but setting -rN to change the resolution does not seem to resolve my problem, at least not for N<=300.
Thank you for your help.
The short answer... Use the same function invoked in the callback for that menu item:
editmenufcn(gcf,'EditCopyFigure');
The longer answer... How exactly did I find this? You can look at my previous answer to a related question about reproducing what is done by a File menu option. The concept is the same, just for a different figure menu. For example, this will find the callback you want for the currently active figure window:
>> hCopyFigure = findall(gcf,'Label','Copy &Figure'); %# Handle for the "Copy
%# Figure" menu item
>> get(hCopyFigure,'Callback') %# Callback invoked when that item is selected
ans =
editmenufcn(gcbf,'EditCopyFigure')
The function EDITMENUFCN is another one of those sparsely documented functions, but looking through the code (by typing edit editmenufcn.m) shows that it either invokes Java (if you're on a Mac) or the undocumented function UIMENUFCN.
I think I found the answer myself. Using print -dmeta -painters to specify the renderer resolves my problem.
In File-->Preference-->Figure Copy Template-->Copy Option I noticed there are 3 options:
Metafile
Preserve information
Bitmap
I found that if I select 1, the Edit-->Copy Figure outputs the same image as print -dmeta. So I kind of confirmed the information I need is in the Preserve information option. A quick google search led me to the discussion about the potential difference of the applied renderer, and eventually I confirmed that using painters will print the image to the clipboard in the way I wanted.
The image in the question seems to be generated by the renderer zbuffer and painters, respectively. I still don't know why the default renderer of paint -dmeta changes, though.