The following example demonstrates how the POW
and SQRT
functions work together to compute the hypotenuse of a right triangle using the Pythagorean theorem.
POW
 X ^{Y} . In this case, 10 to the power of the previous one. See POW Function .SQRT
 computes the square root of the input value. See SQRT Function.
The Pythagorean theorem states that in a right triangle the length of each side (x,y) and of the hypotenuse (z) can be represented as the following:
z^{2} = x ^{2} + y ^{2}
Therefore, the length of z can be expressed as the following:
z = sqrt(x ^{2} + y ^{2} )
Source:
The dataset below contains values for x and y:
X  Y 

3  4 
4  9 
8  10 
30  40 
Transformation:
You can use the following transformation to generate values for z^{2}.
Info 

NOTE: Do not add this step to your recipe right now. 
D trans  


You can see how column Z is generated as the sum of squares of the other two columns, which yields z^{2}.
Now, edit the transformation to wrap the value computation in a SQRT
function. This step is done to compute the value for z, which is the distance between the two points based on the Pythagorean theorem.
D trans  


Results:
X  Y  Z 

3  4  5 
4  9  9.848857801796104 
8  10  12.806248474865697 
30  40  50 