- #MATLAB RANDOM PERMUTE VECTOR HOW TO#
- #MATLAB RANDOM PERMUTE VECTOR GENERATOR#
- #MATLAB RANDOM PERMUTE VECTOR CODE#
Next there’s a long comment block which becomes the help file text (type help randsort and see) and finally the actual body of the function. So whatever the input is when the function is called, internally it will be placed in a variable called n. Now the list of input variables, only one in this case: n. This means that the value of the variable, p when this function terminates, will be returned as the output of the function. Next comes the declaration of the return value p. Notice that the first line starts with the keyword function, which states that this file contains a function rather than a script. % Copyright 1984-2010 The MathWorks, Inc.
#MATLAB RANDOM PERMUTE VECTOR GENERATOR#
% random number generator that underlies RAND, RANDI, and RANDN. % Note that RANDPERM calls RAND and therefore changes the state of the % RANDPERM(n) is a random permutation of the integers from 1 to n. It is implemented in MATLAB and can be viewed by writting open randperm (your copy of MATLAB might have a different implementation, but here’s mine): function p = randperm(n) For example the function randperm(n) returns a random ordering of the numbers 1:n.
The function sin is not written in MATLAB code, so we cannot see how it is implemented, though on occasion it can be useful to see how some MATLAB functions are implemented. We gave the input pi/2 to the function sin and assigned the output to the variable a. When we “call” a function we usually give it input and expect output. Has very restricted interaction with the caller So what’s a function and how is it different from a script?Ī function is also a file with lines of code, but there are several distinctions between a function and a script:
#MATLAB RANDOM PERMUTE VECTOR CODE#
We have also seen scripts files, in which we can put many lines of code and then “call” the script to have MATLAB® execute the lines in that script. This notation can only have one line of code, and oftentimes that can be insufficient for the task at hand.
#MATLAB RANDOM PERMUTE VECTOR HOW TO#
We have just seen-above, using the notation-an example of how to create simple user-defined functions. Workspace manipulations: clean resets the workspace.Vectorization and User-Defined Functions User-Defined Functions vertline draws black vertical line on current axes. showaxes draws the two axes in solid black line. save2word saves plots to Microsoft Word (© Suresh E. maximize resize a figure to fill the screen (© Yuval Cohen) pseudocolor pseudoclor map of a matrix. makex generates x-vector for a given y-vector. horizline draws black horizontal line on current axes. Visualization: confplot plot with continuous confidence boundaries (© Michele Giugliano) ellipse generate the coordinates of rotated and translated ellipse. forcerow ensures that a vector is a row-vector. Vector manipulations: allbut produces a vector of successive integers, missing specific ones. strtokl finds the last token in a string strtokn finds the n'th token in a string Variable verification: nodims finds the ``true" number of dimensions of an array. str2keyword extracts unique identifier of reserved keywords.
reblank removes leading spaces from a string. lexrank2ksubset finds the k-subset T from (1.,n) whose rank is. Combinatorial Algorithms: ksubset2lexrank finds the lexicographic rank of a k-subset T. microarraycolormap gene expression colormap (© Michael Driscoll, Liran Carmel) real2rgb turns a real representation of colors into RGB. Coloring and colormaps: bw black/white colormap.
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