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matlab:matlab_helpful_hacks [2015/08/07 17:06] igorkaganmatlab:matlab_helpful_hacks [2018/11/01 06:03] igorkagan
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 ====== MATLAB helpful hacks ====== ====== MATLAB helpful hacks ======
  
-~~TOC~~ 
  
-== Index Non-Empty Cells in Cell Array ==+==== Index Non-Empty Cells in Cell Array ====
      
  
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 x = {1,[],[],[]}; find(~cellfun(@isempty,x)) </code> x = {1,[],[],[]}; find(~cellfun(@isempty,x)) </code>
  
-== startup.m ==+==== startup.m ====
  
-Starting folder for MATLAB (in the icon | Properties | Start in ) (e.g. D:\Sources\MATLAB) allows controlling different paths and other settings via startup.m file placed in the folder, e.g.: +When MATLAB starts, it will look for a **pathdef.m** file in its startup directory. 
 + 
 +Start up folder (in the MATLAB icon | Properties | Start in ) (e.g. D:\Sources\MATLAB) allows controlling different paths and other settings via startup.m file placed in the folder, e.g.: 
  
 <code matlab> <code matlab>
 disp('Welcome to physiology analysis...'); disp('Welcome to physiology analysis...');
-set_sources_path;+set_sources_path; % set additional paths dynamically, e.g.  
 +% addpath(genpath('D:\Sources\MATLAB')); 
 cd('F:\Data'); cd('F:\Data');
 +edit;
 EditorMacro('Alt-Control-h', @createHeaderComment_dag); EditorMacro('Alt-Control-h', @createHeaderComment_dag);
  
 dbstop if error dbstop if error
 </code> </code>
 +
 +==== Exiting loop (for / while -> pause) gracefully ====
 +(i.e., without "ctrl-C" abort)
 +
 +For example, when paging thru trials:
 +<code matlab>
 +figure('Name','Plot trial','CurrentChar',' ');
 +for k = 1:length(trial),
 +...
 + drawnow; pause;
 + if get(gcf,'CurrentChar')=='q', % pressing "q" will exist the loop, make sure focus is on the figure!
 + break;
 + end
 + clf;
 +end
 +</code>
 +
 +
 +==== Finding indices between two vectors of start and end indices, using arrayfun ====
 +
 +Assume we have two vectors, repeated_segments_start_idx, and repeated_segments_end_idx, and we want to find all indices between each pair. 
 +
 +<code matlab>
 +idx = [repeated_segments_start_idx(segments2remove_idx):repeated_segments_end_idx(segments2remove_idx)] % DOES NOT WORK, OF COURSE!
 +
 +idx = cell2mat(arrayfun(@colon,repeated_segments_start_idx,repeated_segments_end_idx,'UniformOutput',false)); % WORKS!
 +
 +</code>
 +
 +
 +==== Maximize figure window ====
 +<code matlab>set(gcf,'units','normalized','outerposition',[0 0 1 1]);</code>
 +
 +
 +
 +==== Plot an ''imagesc'' with transparent NaNs ====
 +
 +<code matlab>
 +h = imagesc(X,Y,C);
 +set(h,'alphadata',~isnan(C));
 +</code>
 +
 +
 +==== Shifting colormaps ====
 +Sometimes the colormap plots are shifted after printing. To fix this:
 +- in Adobe Illustrator, click on the colormap, release clipping mask, and go to "Object", "Rasterize", in the "Resolution" part click on the "Use Document Raster Effects Resolution".
 +
 +You have to do it for each of the colormaps.
 +
 +
  
matlab/matlab_helpful_hacks.txt · Last modified: 2022/12/29 07:15 by 127.0.0.1