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<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_saving_sppolynomials_spand_spmatrices_spin_spfiles.html" title="">saving polynomials and matrices in files</a></div>
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<div><h1>saving polynomials and matrices in files</h1>
<div>Use the function <a href="_to__String.html" title="convert to a string">toString</a> to convert polynomials, matrices, and other mathematical objects to a linear format that can be saved in a file.<table class="examples"><tr><td><pre>i1 : R = QQ[x..z]
o1 = R
o1 : PolynomialRing</pre>
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<tr><td><pre>i2 : p = (x-y-1)^3
3 2 2 3 2 2
o2 = x - 3x y + 3x*y - y - 3x + 6x*y - 3y + 3x - 3y - 1
o2 : R</pre>
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<tr><td><pre>i3 : m = matrix {{x^2, x^2-y^2, x*y*z^7 }}
o3 = | x2 x2-y2 xyz7 |
1 3
o3 : Matrix R <--- R</pre>
</td></tr>
<tr><td><pre>i4 : M = image m
o4 = image | x2 x2-y2 xyz7 |
1
o4 : R-module, submodule of R</pre>
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<tr><td><pre>i5 : f = temporaryFileName()
o5 = /tmp/M2-21648-1</pre>
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<tr><td><pre>i6 : f << toString (p,m,M) << close
o6 = /tmp/M2-21648-1
o6 : File</pre>
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<tr><td><pre>i7 : get f
o7 = (x^3-3*x^2*y+3*x*y^2-y^3-3*x^2+6*x*y-3*y^2+3*x-3*y-1,matrix {{x^2,
x^2-y^2, x*y*z^7}},image matrix {{x^2, x^2-y^2, x*y*z^7}})</pre>
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<tr><td><pre>i8 : (p',m',M') = value get f
3 2 2 3 2 2
o8 = (x - 3x y + 3x*y - y - 3x + 6x*y - 3y + 3x - 3y - 1, | x2 x2-y2
------------------------------------------------------------------------
xyz7 |, image | x2 x2-y2 xyz7 |)
o8 : Sequence</pre>
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<tr><td><pre>i9 : p == p'
o9 = true</pre>
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<tr><td><pre>i10 : m == m'
o10 = true</pre>
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<tr><td><pre>i11 : M == M'
o11 = true</pre>
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<tr><td><pre>i12 : removeFile f</pre>
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