I just want to make a " x² " expression on Evaluate expression designer and I CANT!

Oh gosh, somebody help me... I just want to make a simple function, with one variable: x², and it appears the error message: 1. Parameter "Variable x" has an invalid name. Only use alphanumeric characters and don't start with a number.

What am I doing wrong? How should I write the expression?

Thanks

Replies to This Discussion

Permalink Reply by Thijs van der Lely on May 19, 2017 at 6:05am

Try not to use "Draw Full Names".

When you use Full Names the "Variable name" is not "x" anymore.

If you deselect that function in the Display options and reconnect the expression panel and number, it should work.

Permalink Reply by David Rutten on May 19, 2017 at 6:06am

The problem here is not with the specific notation. It's with the variable name. Variables are not allowed to contain spaces or weird characters, and both your variables are invalid. "Variable x" is no good. You need to remove the "Variable" part and only name it "x".

The error message is pretty explicit about this:

This is probably because you're using the 'Draw Full Names' option which does not play nice with expression variable parameters. You'll have to manually fix the names before any expression will run.

Permalink Reply by Helen Rachel on May 19, 2017 at 6:14am