MATLAB POLYSPACE RELEASE NOTES Manual de usuario descargar pdf (Pagina 39)

Working w ith Matrices

R = randn(4,4)

0.6353 0.0860 -0.3210 -1.2316

-0.6014 -2.0046 1.2366 1.0556

0.5512 -0.4931 -0.6313 -0.1132

-1.0998 0.4620 -2.3252 0.3792

The load Function

The load function reads binary files containing matrices generated by earlier

MATLAB sessions, or reads text files containing numer ic data. The text file

should be organized as a rectangular table of numbers, separated by blanks,

with one row per line, and an equal number of elements in each row. For

example, outside of MATLAB, create a text file containing these four lines:

16.0 3.0 2.0 13.0

5.0 10.0 11.0 8.0

9.0 6.0 7.0 12.0

4.0 15.0 14.0 1.0

Savethefileasmagik .dat in the current directory. The statement

load magik.dat

reads the file and creates a variable, magik, containing t he example matrix.

An easy way to read data into MATLAB in many text or binary formats is to

use the Import Wizard.

M-Files

You can create your own matrices using M-files, which are text files containing

MATLAB code. Use the MATLAB Editor or another text editor to create a file

containing the same statements you would type at the MATLAB command

line. Save the file under a name that ends in

.m.

For example, create a file in the current directory named

magik.m containing

thesefivelines:

A = [16.0 3.0 2.0 13.0

5.0 10.0 11.0 8.0

2-17

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 239 240

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MATLAB POLYSPACE RELEASE NOTES Manual de usuario Pagina 39