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Expressions
Plot functions which allow mathematical expressions supports the following functions:
+, -, *, / | arithmetic operations |
%, mod | modulo |
( ) | grouping |
^, ** | power |
rad(x), deg(x) | conversion between radians and degrees |
sin(x),cos(x),tan(x) | trigonometric functions |
asin(x),acos(x),atan(x) | inverse trigonometric functions |
sinh(x),cosh(x),tanh(x) | hyperbolic functions |
rnd(h) | random number (h = height) |
ln(x),log(x) | natural and logarithm to base 10 |
sqrt(x) | square root |
cbrt(x) | cubic root |
frac(x) | returns the fraction of x |
int(x) | returns the integer of x |
round(x;n) | round up and down to the nth place on the right of the decimal point |
gau(x;x0;a;w) | Gauss (x0 = position, a = amplitude, w = width) |
lor(x;x0;a;w) | Lorentz (x0 = position, a = amplitude, w = width) |
galo(x;x0;a;w;r) | Gauss-Lorentz (x0 = position, a = amplitude, w = width, r =Gauss-Lorentz ratio (1.0=pure Gauss,0.0 = pure Lorentz)) |
tail(x;x0;a;w;r;t) | Gauss-Lorentz with exponential Tail (x0 = position, a = amplitude, w = width, r = Gauss-Lorentz ratio(1.0=pure Gauss,0.0 = pure Lorentz)), t = tail exponent factor |
j0(x), j1(x), jn(x;n) | bessel functions |
y0(x), y1(x), yn(x;n) | bessel functions |
pi | 3.14159265359 |
e | 2.71828182846 |
xval(b;i) | x value of point i in buffer b |
yval(b;i) | y value of point i in buffer b |
xerr(b;i) | x error value of point i in buffer b |
yerr(b;i) | y error value of point i in buffer b |
xnval(b;i) | normalized x value (0.0-1.0) of point i in buffer b |
ynval(b;i) | normalized y value (0.0-1.0) of point i in buffer b |
xnerr(b;i) | normalized x error value (0.0-1.0) of point i in buffer b |
ynerr(b;i) | normalized y error value (0.0-1.0) of point i in buffer b |
xvf(b) | x value of the first point in buffer b |
xvl(b) | x value of the last point in buffer b |
yvf(b) | y value of the first point in buffer b |
yvl(b) | y value of the last point in buffer b |
xmin(b) | minimum x value in buffer b |
xmax(b) | maximum x value in buffer b |
ymin(b) | minimum y value in buffer b |
ymax(b) | maximum y value in buffer b |
exmin(b) | minimum x error value in buffer b |
exmax(b) | maximum x error value in buffer b |
eymin(b) | minimum y error value in buffer b |
eymax(b) | maximum y error value in buffer b |
txmin | minimum x value over all buffers |
txmax | maximum x value over all buffers |
tymin | minimum y value over all buffers |
tymax | maximum y value over all buffers |
vxmin(b) | minimum x value over all visible buffer |
vxmax(b) | maximum x value over all visible buffer |
vymin(b) | minimum y value over all visible buffer |
vymax(b) | maximum y value over all visible buffer |
points(b) | number of points in buffer b |
xpoint(v;a) | x screen coordinate of v (a can be 1 for the first or 2 for the second axis). |
xvalue(v;a) | x value of the screen coordinate v (a can be 1 for the first or 2 for the second axis). |
ypoint(v;a) | y screen coordinate of v (a can be 1 for the first or 2 for the second axis). |
yvalue(v;a) | y value of the screen coordinate v (a can be 1 for the first or 2 for the second axis). |
findx(v;b) | x value which depends to y in buffer b. If there are more than one it returns the first it found. |
findy(v;b) | y value which depends to x in buffer b. If there are more than one it returns the first it found. |
fnx(v;b) | normalized x value (0.0-1.0) which depends to y in buffer b. If there are more than one it returns the first it found. |
fny(v;b) | normalized y value (0.0-1.0) which depends to x in buffer b. If there are more than one it returns the first it found. |