Navigation:  Data manipulation actions > Apply formula

New data are computed based on the user-defined formula Y(X,Y)= ... and the current Range of data.

The symbol Y refers to the current y-values. The formula Y(X,Y)=SQRT(Y), for example, replaces the current data by their square root.

 

You can also refer to the data of the three subwindows. The formula Y(X,Y)=sqrt(C1)  replaces the data of the main window by the square root of the data in subwindow 'C1'.

 

In the formula editor you can use the following functions:

 

Function        Explanation        

 

abs(...)                the absolute value of the argument

 

       

 

sin(...)

cos(...)

tan(...)                trigonometric functions (argument in rad)

cot(...)                                

 

asin(...)

acos(...)        inverse trigonometric functions

atan(...)        

       

 

sinh(...)

cosh(...)        hyperbolic functions

tanh(...)                

 

exp(...)                the exponential        

ln(...)                the natural logarithm        

log(...)                the logarithm with base 10        

sqr(...)                the square of the argument        

sqrt(...)                the square root of the argument        

frac(...)                returns the fractional part of the argument        

int(...)                  returns the integer part of the argument        

step(...)        the step or 'heavyside' function        

 

 

rect(...)                the rect function        

 

 

rnd(...)                returns random numbers centered around 0 with amplitude

         given by the argument, the values are equally distributed

 

 

gauss(...)        returns gauss-distributed random numbers centered around 0.

         The standard deviation of the distribution is given by the argument.

 

 

si(...)                sin(...)/(...)        

 

 

pi                3.14159        

 

Expressions of the form number1^number2 are allowed and return the number2'th power of number1. Of course the usual operators +,-,*,/ and () can be used to combine expressions.