Yacas - Yet Another Computer Algebra System

for Epoc

(Psion 5/5mx, Revo,7/netBook, etc.)



Screenshots Gallery

Screenshots using Yacas 1.0.56 for EPOC and Client&Server 1.30&1.40

Psion Revo+ running Yacas 1.0.56

In the first time some commands are called, they load their definitions from scripts, so it takes more time. The used RAM starts with 1.9 MB and reaches 3.6 MB after "Out(4)" :
1st Revo+ screenshot of Yacas 1.0.56

Almost the same calculations, but they are faster because now the scripts are already loaded, while the used RAM stays unchanged :
2nd Revo+ screenshot of Yacas 1.0.56

'"PrettyForm" is very useful to make the outputs easier to understand, but it is slow and takes a lot of screen space. The trailing backslash "\" at end of "In(13)" means that it spans to "In(14)" and the multiple input lines are merged before calculation. The "ToFile" command exports the output to the text file "C:\prettySol.txt" :
3rd Revo+ screenshot of Yacas 1.0.56

Although the Revo screen is small, the scroll bars allow to browse very long outputs; there are some digits hidden by the vertical scroll bar that can be displayed moving the horizontal scroll bar, in the case you have calculated by yourself... :-) :
4th Revo+ screenshot of Yacas 1.0.56

Epoc Emulator 1/2 VGA (Series 5 size) running Yacas 1.0.56

The larger screen of a Psion Series 5/5MX showing a simple solve solution for a quadratic equation. The same calculations made on a Psion Revo+ take 30.84 and 7.66 seconds (repeating the solve, the time decreases to 17.66 seconds because the solve script is already loaded) :
Series 5 screenshot of Yacas 1.0.56

Epoc Emulator VGA (Series 7 size) running Yacas 1.0.56

The large screen of a Psion Series 7/netBook is very comfortable to run Yacas sessions. The same calculations made on a Psion Revo+ take 7.61, 42.13, 34.69, 5.73 and 36.06 seconds :
Series 7 screenshot of Yacas 1.0.56


Last update : March 22nd 2004