You can also enter a third option which will be plotted if the first condition is not met - for example "if (x > y, x*x - y*y, x)" will plot \(x^2\) - \(y^2\) in all areas where \( x \) is greater than \( y\), and \(x \) in all areas where x is not greater than y. If, for example, you wanted to show the funtion \(x^2\) - \(y^2\) but only in areas where \(x\) is greater than \(y\), you would enter "if (x > y, x*x - y*y)" in the expression box. You can also apply certain constraints/inequalities to the graph. The square root of x (for positive x only) The inverse of the three trigonometric functions listed above The table below lists which functions can be entered in the expression box. Clicking on the graph will reveal the x, y and z values at that particular point. The graph can be zoomed in by scrolling with your mouse, and rotated by dragging around. When you hit the calculate button, the demo willĬalculate the value of the expression over the x and y ranges provided and then plot the result as a surface. This demo allows you to enter a mathematical expression in terms of x and y.
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