matrix

• v=V(:) # from matrix to vector
• numel # total number of elements in a matrix
  • use numel instead of length
• meshgrid
• ndgrid # prepare a mesh of x y z coordiante values
• sparse # full to sparse matrix
• full # sparse to full matrix
• reshape
  • use [] to represent the total number of elements
• repmat: replicat and tile an array

string

• strrep # replace string
• int2str

digital signal processing

• filter
• conv, conv2

statistical estimation

• polyfit & polyval
• autocorr

Graphics

• get: get properties of a variable
• set: set properties of a variable
• imshow, imshowpair
• ksdensity: for R-style density plot
• medfilt1
• medfilt2
• figure properties
  • http://cn.mathworks.com/help/matlab/ref/figure-properties.html
  • Position — Location and size of figure's drawable area
  • [left bottom width height]

paralle computing

• Run matlab on SGE
  • http://wangyufeng222.blog.163.com/blog/static/128222070201352892134516/

issues

• slow startup
  • answer: https://cn.mathworks.com/matlabcentral/answers/98599-why-will-matlab-not-start-up-properly-on-my-linux-or-unix-based-system