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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<TITLE>SYSTEM Call an External Program
</TITLE>
</HEAD>
<BODY>
<H2>SYSTEM Call an External Program
</H2>
<P>
Section: <A HREF=sec_os.html> Operating System Functions </A>
<H3>Usage</H3>
The <code>system</code> function allows you to call an external
program from within FreeMat, and capture the output.
The syntax of the <code>system</code> function is
<PRE>
y = system(cmd)
</PRE>
<P>
where <code>cmd</code> is the command to execute. The return
array <code>y</code> is of type <code>cell-array</code>, where each entry
in the array corresponds to a line from the output.
<H3>Example</H3>
Here is an example of calling the <code>ls</code> function (the
list files function under Un*x-like operating system).
<PRE>
--> y = system('ls')
y =
Columns 1 to 3
[chain1.m] [chain2.m] [chain3.m]
Columns 4 to 6
[conv2_eqn1.png] [conv2_eqn.aux] [conv2_eqn.dvi]
Columns 7 to 9
[conv2_eqn.log] [conv2_eqn.tex] [cumprod_eqn1.png]
Columns 10 to 12
[cumprod_eqn.aux] [cumprod_eqn.dvi] [cumprod_eqn.log]
Columns 13 to 15
[cumprod_eqn.tex] [cumsum_eqn1.png] [cumsum_eqn.aux]
Columns 16 to 18
[cumsum_eqn.dvi] [cumsum_eqn.log] [cumsum_eqn.tex]
Columns 19 to 21
[do_jit_test.m] [eig_eqn1.png] [eig_eqn2.png]
Columns 22 to 24
[eig_eqn3.png] [eig_eqn4.png] [eig_eqn5.png]
Columns 25 to 27
[eig_eqn6.png] [eig_eqn.aux] [eig_eqn.dvi]
Columns 28 to 30
[eig_eqn.log] [eig_eqn.tex] [evenoddtest.m]
Columns 31 to 33
[fft1.jpg] [fft1.png] [fft2.jpg]
Columns 34 to 36
[fft2.png] [fft_eqn1.png] [fft_eqn2.png]
Columns 37 to 39
[fft_eqn3.png] [fft_eqn4.png] [fft_eqn.aux]
Columns 40 to 42
[fft_eqn.dvi] [fft_eqn.log] [fft_eqn.tex]
Columns 43 to 45
[find_eqn1.png] [find_eqn.aux] [find_eqn.dvi]
Columns 46 to 48
[find_eqn.log] [find_eqn.tex] [help]
Columns 49 to 51
[jit_test001.m] [jit_test002.m] [jit_test003.m]
Columns 52 to 54
[jit_test004.m] [jit_test005.m] [jit_test006.m]
Columns 55 to 57
[jit_test007.m] [jit_test008.m] [jit_test009.m]
Columns 58 to 60
[jit_test010.m] [jit_test011.m] [jit_test012.m]
Columns 61 to 63
[jit_test013.m] [jit_test014.m] [jit_test015.m]
Columns 64 to 66
[jit_test016.m] [jit_test017.m] [jit_test018.m]
Columns 67 to 69
[jit_test019.m] [jit_test020.m] [jit_test021.m]
Columns 70 to 72
[jit_test022.m] [jit_test023.m] [jit_test024.m]
Columns 73 to 75
[loadsave.dat] [max_eqn1.png] [max_eqn2.png]
Columns 76 to 78
[max_eqn3.png] [max_eqn.aux] [max_eqn.dvi]
Columns 79 to 81
[max_eqn.log] [max_eqn.tex] [mean_eqn1.png]
Columns 82 to 84
[mean_eqn.aux] [mean_eqn.dvi] [mean_eqn.log]
Columns 85 to 87
[mean_eqn.tex] [min_eqn1.png] [min_eqn2.png]
Columns 88 to 90
[min_eqn3.png] [min_eqn.aux] [min_eqn.dvi]
Columns 91 to 93
[min_eqn.log] [min_eqn.tex] [nargintest.m]
Columns 94 to 96
[nargouttest.m] [source_test] [source_test_script.m]
Columns 97 to 99
[test_assignin1.m] [test_assignin2.m] [test_bin2int1.m]
Columns 100 to 102
[test_bitand1.m] [test_bitor1.m] [test_bitxor1.m]
Columns 103 to 105
[test.bmp] [test_builtin1.m] [test_cell1.m]
Columns 106 to 108
[test_clear1.m] [test_clear2.m] [test_conv2_1.m]
Columns 109 to 111
[test_ctype1.m] [test.dat] [test_dcomplex1.m]
Columns 112 to 114
[test_diag1.m] [test_diag2.m] [test_diag3.m]
Columns 115 to 117
[test_diag4.m] [test_diag5.m] [test_dlmread1.m]
Columns 118 to 120
[test_eig1.m] [test_eig2.m] [test_eig3.m]
Columns 121 to 123
[test_eig4.m] [test_eig5.m] [test_eig6.m]
Columns 124 to 126
[test_empty.m] [test_eps1.m] [test_error1.m]
Columns 127 to 129
[test_eval1.m] [test_eval2.m] [test_eval3.m]
Columns 130 to 132
[test_evalin1.m] [test_evalin2.m] [test_exist1.m]
Columns 133 to 135
[test_exist2.m] [test_feval1.m] [test_fieldnames1.m]
Columns 136 to 138
[test_imwrite_imread.m] [test_int2bin1.m] [test_isset1.m]
Columns 139 to 141
[test_jit.m] [test_lasterr1.m] [test_load1.m]
Columns 142 to 144
[test_lu1.m] [test_lu2.m] [test_nargin1.m]
Columns 145 to 147
[test_nargin2.m] [test_permute1.m] [test_permute2.m]
Columns 148 to 150
[test_repmat1.m] [test_repmat2.m] [test_repmat3.m]
Columns 151 to 153
[test_save1.m] [test_source.m] [test_sparse20.m]
Columns 154 to 156
[test_sparse21.m] [test_sparse45.m] [test_sparse58.m]
Columns 157 to 159
[test_sparse68.m] [test_sparse70.m] [test_sparse74.m]
Columns 160 to 162
[test_sparse75.m] [testtext] [test_typeof1.m]
Columns 163 to 165
[test_typeof2.m] [test_typeof3.m] [test_typeof4.m]
Columns 166 to 168
[test_typeof5.m] [test_typeof6.m] [test_uint64_1.m]
Columns 169 to 169
[toolbox]
--> y{1}
ans =
chain1.m
</PRE>
<P>
</BODY>
</HTML>
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