# Update notebook after I changed a variable?

Posted 3 months ago
262 Views
|
|
0 Total Likes
|
 Hello, I just started with Mathematica and coming from MathCAD because of its poor functionality in higher math. Now I created a new Spreadsheet and was just trying around with some functions and variables. Because I want to make some big calculations, I must have the possibility to sometimes changes some variables/functions at the start. Therefore i need the option to update my whole spreadsheet with these changes, without reentering all the later commands. Greetings.
 You can mark some cells as "Initialization cells". When you need to re-evaluate them with new values you just choose "Evaluate initialization" from the Evaluation menu. There is also the Dynamic mechanism. If you have v = 2; f[x_] := x^2; Dynamic[f[v]] and later change the value of v, the output of Dynamic will be updated immediately.