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Contents → Standard User Functions → calc.4 → Examples

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Create a circle of 101 points, radius 3.

fn calc.4 n = 101; x = 3 * cos(pi*i/50); y = 3 * sin(pi*i/50)

Invert x, set error bars to the square root of y.

fn . x ^= -1; s = y ^ .5

or

fn . x = 1 / x ; s = sqrt(y)

Create a cosine curve of 201 points with x running from -10 to 10 radians.

fn . n = 201; y = cos(x = -10 + 20 * i / 200)

Increment the variable A, and increment each y by 0.2 times A.

fn .  once A += 1; y += A * 0.2

Note the once means A gets incremented once. You can now enter fn . to increase the y values by another step, perhaps repeating this operation to plot a series of curves offset by constant increments.

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