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Excel's Formula - sisman

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Part V: Miscellaneous <strong>Formula</strong> Techniques<br />

Figure 17-14: A general-purpose, single-variable plotting workbook.<br />

Plotting functions with two variables<br />

The preceding section describes how to plot functions that use a single variable (x). You also can<br />

plot functions that use two variables. For example, the following function calculates a value of z<br />

for various values of two variables (x and y):<br />

z = SIN(x)*COS(y)<br />

Figure 17-15 shows a surface chart that plots the value of z for 21 x values ranging from 2 to 5 (in<br />

0.15 increments) and for 21 y values ranging from –3 to 0 (also in 0.15 increments).

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