Piecewise TF1 through parameter switch

ROOT
1

Consider a function object like TF1(“myFunctionName”, “([0]*3 - 5)*x”, -1, 1), where [0] has the following rule:
[0] = 1 if x<0. Otherwise, [0]=1. (The function will appear piecewise)

How would I build a function with this property? The parameter should change value conditionally with x.

2

Consider doing something like the case 3 on this page.

3

Hi Couet, do you mean the lambda function example?

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Case 3: inline expression using a user defined CLING function by name

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