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<div><h1 id="a0000000023">4 Performing calculations</h1>
<p>Often calculations need to be performed on data before they are plotted. This chapter and the next describe the mathematical environment which Pyxplot provides. </p><p>Most of the examples in this chapter act on single numerical values, displaying the results using the <tt class="tt">print</tt> command, demonstrating how Pyxplot may be used as a desktop calculator. The next chapter will extend this to use of Pyxplot’s mathematical environment to analyse whole datasets and produce plots. </p></div>
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<li><a href="sect0023.html">4.1 Variables</a>
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<li><a href="ex-funcsplice.html">4.3.1 Spliced functions</a>
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<li><a href="sec-angles.html">4.6.1 Treatment of angles in Pyxplot</a>
</li><li><a href="sect0024.html">4.6.2 Converting between different temperature scales</a>
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</li><li><a href="sect0027.html">4.9 Solving systems of equations</a>
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