min and max of a function

To find the min and max of a function you can use several methods. However the functions Minimize() and Maximize() have a different purpose (I suggest, you look them up in the help).

Assuming you have a mathematical description of the function, the best way is to differentiate that function, find the zero's of the derivative andf check for each of those if it's a minimum or a maximum etc.. You've probably learnt that in school. Note that Mathcad will allow you to differentiate symbolically or numerically.

Another way is to step your running value from start to end of its domain and calculate each corresponding function value and determine whether it's the lowest or highest value you've encountered. By the end you should have the two extremes. This method is less accurate, of course: you might miss a narrow peak or valley.

Since you did not provide a worksheet, no help with your specific function is possible.

Success!
Luc

Attach your file. Can't do mathcad with pictures.

Its hard to work with pictures so you sure should attach your worksheet if possible.

One suggestion:

1) below the plot write δv:=δ= (the last evaluation = is important as is turns the range into a vector).

2) Change the "maximize" in the expression below to "max" and the "δ" to "δv"

Did this do the trick?

If not, you may have to vectorize the function call  "P.c_all_max(δv)".
Thats the operation which is shown as an arrow over the expression.