Hi,
Thank you so much for the time that you have spent on a very powerful free program. I have been a serious user of Mathcad for the last 15 years.

I have listed three important elements that you should consider. The first two I think are essential.

1. Help! I need an option to disable automatic re-calculation. Mathcad uses “F9” for manual recalculation when automatic recalculation is turned off. It takes much time to wait for recalculation while composing the document.

2. Help! Must have a way to interrupt computation. This is needed if an endless or a very long calculation is started by accident. (I do this too often.) Mathcad uses the “esc” key to do this.

3. It would be good if a “program” (for, while, if, & line) could be on the right side of a function definition. For example, I have written a Discreet Fouier Transform (DFT) for SMath which uses a “FOR” loop. It would be good if I could write it as a function.

(BTW: The DFT runs very slowly. 10 or 15 minutes for 30 points! I hope to improve it by taking advantage of symmetry, or I will write an FFT. I usually like DFT because I want the whole complex result.)

Sud