Contents

Compile

First, run make.m to create mex files. NOTE: 1) refer to your Matlab on line help on how to configure mex and create mex file 2) LineTwoPnts.mexw32 and SegInMat.mexw32(matlabr2006a + win32) are already contained in the zip file. check them.

make

Line Two Points

now everything is ready, let's line two arbitrary points in Cartesian coordinates

[rr, cc] = LineTwoPnts(-2,-3, 2,4);
disp('The line between (-2,-3) and (2,4): ');
disp('row: ');disp(rr);
disp('col: ');disp(cc);

The line between (-2,-3) and (2,4): 
row: 
    -2    -1    -1     0     0     1     1     2

col: 
    -3    -2    -1     0     1     2     3     4

Line Two Points In Matrix

you may also want to return all the value of a segment within a matrix:

mat = reshape(1:18, 3, 6);
elems = SegInMat(mat, 1,1, 3,5);
disp('mat:'); disp(mat);
disp('the values of line (1,1) and (3,5) within mat: ');
disp(elems);

mat:
     1     4     7    10    13    16
     2     5     8    11    14    17
     3     6     9    12    15    18

the values of line (1,1) and (3,5) within mat: 
     1     5     8    12    15

That's it

have fun:)

Published with MATLAB® 7.2