Matlab Single Value Default Function

function default(varargin)
   param = [varargin{:} ';'];
   ind = find(param=='=');
   stmt = 'if ~exist(''%s'',''var'');%s;end';
   str = sprintf(stmt,param(1:(ind(1)-1)),[varargin{:}]);
   evalin('caller', str);
end


Example use

default x=2

Matlab text that scales with figure size

text(0.52,0.52,'52','FontUnits','normalized','FontSize',0.11)

Good observation

"Just as machine learning algorithms can overfit by tuning a classifier’s parameters to the
accidental properties of a training set, a research community can overfit by refining algorithms that
have already done well on the existing data sets"



Lewis, D. D.; Yang, Y.; Rose, T.; and Li, F. RCV1: A New Benchmark Collection for Text Categorization Research. Journal of Machine Learning Research, 5:361-397, 2004. http://www.jmlr.org/papers/volume5/lewis04a/lewis04a.pdf

MS Word's Latex support

http://iun.edu/~mathiho/useful/word07shortcuts.pdf

Matlab Keyboard function

keyboard function is useful for debugging purposes. It stops execution of m file and allows user to watch and manipulate variables.

Reset Random Number Genaration of Matlab

reset(RandStream.getDefaultStream,sum(100*clock))
http://www.mathworks.com/support/solutions/en/data/1-18WH6/

Matlab Jit Acceleration

• Avoid sparse matrices
• Avoid static variables
• Vectorize the code
• Use scalar values in range of for loops
• Only call built in functions in for loops
• http://www.ee.columbia.edu/~marios/matlab/accel_matlab.pdf

Moving file to folder in HG versioning system

Just copy files into desired directory. Go into that directory and right click. Go to hg->guess renames. Rest is straightforward.

http://kiln.stackexchange.com/questions/1943/moving-a-file-in-a-repository

Semi Turing Test

A loosely definition for semi-Turing test is whether a human is capable to understand an output from human and output from computer aided human. For example If I am using spell checker , how someone can understand that I am doing so. It requires much more effort to distinguish.

A word

Aforementioned = Bahsi gecen

Exit code 0000135

Dll not found error

Lyx Bold

Ctrl + B

Matlab Long Simulation Interactive Debug , Set Debug flag using GUI , Pause execution to debug

Create a button function:


function util_DebugGuiButtons()
global debugFlag;
uicontrol('Position',[30 10 35 40],'String','||','Callback',@wait);
uicontrol('Position',[70 10 35 40],'String','>>','Callback',@dontwait);
function wait(hObject,eventdata)
debugFlag = 1;
end

function dontwait(hObject,eventdata)
debugFlag = 0;
dbcont;
end
end



Define in top of document:
global debugFlag


Put this inside your loop :


    if (debugFlag)
        dbstop in file.m at line
end



Continue Button is not working as desired now. It just clears the breakpoints but does not issue dbcont command properly. I will try to figure out later.

Comments on variables

Matlab displays comments of functions when you tend to use it. It would be good if it can show the comment of variables while holding mouse on top of variable name. This way can provide a tool to remember what each variable if for without using long descriptive variable names.

Yan cumle

points that are close to the decision boundary.

mouse and pencil

While being a student my life is accomodated with two items   mouse and pencil.So why we are not combining them . Put a wireless mouse pen to one side and put a pencil to other side. A gyro sensor can figure out if mouse is active.

Robot Dish Washer

It is difficult to create robot that cleans our arbitrary dirty dishes. However  , if we put some digital information on dishes (special designed for this machine) such as RFID , than robot can easily understand the shape , coordinates and features of the dish. In this way it will be easy to optimize the placement of the dishes based on current dirty dishes information.
I imagine we can create machine that has two part , first part is regular dish washer and second part is open area for dirty dishes and attached robot hands at top. It will increase the size of the machine , but it may worth , especially for big restaurants.

LDA PCA connection

"LDA can also be seen as a  type of principal component analysis for discrete data"

http://www.cs.princeton.edu/~blei/papers/Blei2012.pdf

MATLAB pass by reference

Handles handles the pass by reference issue in MATLAB.

http://www.mathworks.com/help/matlab/matlab_prog/copying-objects.html

Durable E ink display

http://www.eink.com/rugged.html

Is there a relation ?

Conservative - Underfitting
Liberal - Overfitting

Macro , Micro avarage, F-score,precision,recall

http://rushdishams.blogspot.com/2011/08/micro-and-macro-average-of-precision.html

Display Array in NetBeans

Netbeans uses GDB:

http://stackoverflow.com/questions/1651682/how-to-watch-a-c-dynamic-array-using-gdb

64 bit GSL

https://code.google.com/p/oscats/downloads/detail?name=gsl-1.15-dev-win64.zip&can=2&q=