Microsoft Office Tutorials and References
In Depth Information
Plotting functions with two variables
The preceding section describes how to plot functions that use a single variable ( x ). You also can plot functions
that use two variables. For example, the following function calculates a value of z for various values of two
variables ( x and y ):
z = SIN(x)*COS(y)
Figure 17-16 shows a surface chart that plots the value of z for 21 x values ranging from 2 to 5 (in 0.15 incre-
ments) and for 21 y values ranging from –3 to 0 (also in 0.15 increments).
Figure 17-16: Using a surface chart to plot a function with two variables.
Figure 17-17 shows a general-purpose, two-variable plotting application, similar to the single-variable work-
book described in the previous section. The data for the chart is a 25 x 25 data table in range M7:AL32 (not
shown in the figure). To use this application
1. Enter a formula in cell B3. The formula should contain at least one x variable and at least one y variable.
In the figure, the formula in cell B3 is
=SIN(x)*COS(y*x)
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