mirror of https://github.com/texmacs/doc.git
72 lines
4.1 KiB
Tcl
72 lines
4.1 KiB
Tcl
<TeXmacs|1.0.7.14>
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<style|tmdoc>
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<\body>
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<tmdoc-title|Spreadsheets>
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<TeXmacs> provides rudimentary spreadsheet-like facilities with the
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advantage that the computations can be carried out using any of the
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plug-ins that can be used as a scripting language. In order to use the
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spreadsheet facilities, you should therefore start with the selection of a
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scripting language in the menu <menu|Document|Scripts>.
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As soon as you have selecting a scripting language, such as <name|Maxima>,
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then you may enter a new spreadsheet using <menu|Insert|Table|Textual
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spreadsheet> or <menu|Insert|Table|Numeric spreadsheet>. You may edit the
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spreadsheet as an ordinary table, except that the <key|return> key will
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attempt to reevaluate the cells of the table.
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In addition, when preceding the contents of a cell by =, then cell will be
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considered as an input-output switch. More precisely, the input is a
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formula which will be evaluated using the current scripting language. After
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the evaluation, only the result of the evaluation is shown in the cell.
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After pressing <key|return> a second time in the cell, it will be possible
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switch back and edit the input. In the formulas, one may refer to the
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others using names such as c5 for the third row and the fifth column.
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<\example>
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On the left-hand side of the figure below, we have displayed a simple
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table with formulas for evaluating the sums of the first two items of
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each row. On the right-hand side, we have shown the result after
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evaluation.
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<\big-figure|<small|<with|prog-scripts|maxima|<calc-table|simple1|<numeric-dot-table|<tformat|<cwith|1|-1|1|-1|cell-width|5em>|<cwith|1|-1|1|-1|cell-hmode|max>|<table|<row|<cell|<cell-inert|a1|1>>|<cell|<cell-inert|a2|10>>|<cell|<cell-inert|a3|=a1+a2>>>|<row|<cell|<cell-inert|b1|100>>|<cell|<cell-inert|b2|1000>>|<cell|<cell-inert|b3|=b1+b2>>>>>>><space|2em><calc-table|simple2|<numeric-dot-table|<tformat|<cwith|1|-1|1|-1|cell-width|5em>|<cwith|1|-1|1|-1|cell-hmode|max>|<table|<row|<cell|<cell-inert|a1|1>>|<cell|<cell-inert|a2|10>>|<cell|<cell-output|a3|=a1+a2|<math|11>>>>|<row|<cell|<cell-inert|b1|100>>|<cell|<cell-inert|b2|1000>>|<cell|<cell-output|b3|=b1+b2|<math|1100>>>>>>>>>>>
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Evaluation of a simple spreadsheet.
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</big-figure>
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</example>
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<\example>
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The cells may contain mathematical formulas and the spreadsheet may take
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advantage of any of the capacities of the scripting language. For
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instance, the figure below demonstrates another possible use of
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<name|Maxima>.
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<\big-figure|<small|<with|prog-scripts|maxima|<calc-table|derivatives1|<numeric-dot-table|<tformat|<cwith|1|-1|1|1|cell-width|15em>|<cwith|1|-1|1|1|cell-hmode|max>|<table|<row|<cell|<cell-inert|a1|<math|sin<around*|(|x<rsup|2>|)>>>>>|<row|<cell|<cell-inert|b1|=diff(a1,x)>>>|<row|<cell|<cell-inert|c1|=diff(b1,x)>>>|<row|<cell|<cell-inert|d1|=diff(c1,x)>>>>>>><space|2em><calc-table|derivatives2|<numeric-dot-table|<tformat|<cwith|1|-1|1|1|cell-width|15em>|<cwith|1|-1|1|1|cell-hmode|max>|<table|<row|<cell|<cell-inert|a1|<math|sin<around*|(|x<rsup|2>|)>>>>>|<row|<cell|<cell-output|b1|=diff(a1,x)|<math|2*x*cos
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<around*|(|x<rsup|2>|)>>>>>|<row|<cell|<cell-output|c1|=diff(b1,x)|<math|2*cos
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<around*|(|x<rsup|2>|)>-4*x<rsup|2>*sin
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<around*|(|x<rsup|2>|)>>>>>|<row|<cell|<cell-output|d1|=diff(c1,x)|<math|-12*x*sin
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<around*|(|x<rsup|2>|)>-8*x<rsup|3>*cos
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<around*|(|x<rsup|2>|)>>>>>>>>>>>>
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Computation of successive derivatives using <name|Maxima>.
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</big-figure>
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</example>
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<TeXmacs> supports a few special notations for applying operations on all
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cells in a subtable. For instance,
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<tmdoc-copyright|2012|Joris van der Hoeven>
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<tmdoc-license|Permission is granted to copy, distribute and/or modify this
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document under the terms of the GNU Free Documentation License, Version 1.1
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or any later version published by the Free Software Foundation; with no
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Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
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Texts. A copy of the license is included in the section entitled "GNU Free
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Documentation License".>
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</body>
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<\initial>
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<\collection>
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<associate|language|english>
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</collection>
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</initial> |