8.5 Toolbar (Alg\en\Yacas) 

Figure 8.5 The toolbar Alg\en\Yacas (general purpose CAS).

8.5.1 Description of the buttons 

1.   YACAS  : launches the YACAS program for Windows.
2.   EMACS/ast  : launches the Emacs program for Windows from the directory ASTEXDIR (necessary to use the button boutonEyacas).
3.   Eyacas  : attempts to launch Yacas in a shell of Emacs. Emacs must be already open. The command sent to the shell is runprg.bat yacas. Yacas cannot be launched in this way (error invalid Handle).
4.   << Doc>>  : marker of the group of buttons << Documentation>>. This button doesn't execute any action, it serves just as visual separator between the groups of buttons.
5.   Web site  : displays the site of Yacas in the default web browser.
6.   Loc web  : displays a local copy of the site of Yacas in the default web browser.
7.   Tutorial  : displays the tutorial of Yacas.
8.   Manuals  : displays the manuals of Yacas.
9.   << Tests com>>  : marker of the group of buttons << Common tests>>. This button doesn't execute any action, it serves just as visual separator between the groups of buttons.
10.   1+2  : add 1 and 2 in Yacas.
11.   2*3  : multiply 2 by 3 in Yacas.
12.   2^10  : calculate 2 to the power 10 in Yacas.
13.   1/3+3/4  : add two fractions in Yacas.
14.   100 !  : calculate the factorial of 100 in Yacas.
15.   Quit  : quit the Yacas program.
16.   << Tests spec>>  : marker of the group of buttons << Tests specific to the program>>. This button doesn't execute any action, it serves just as visual separator between the groups of buttons.
17.   (a+b)^2  : expands the polynomial (a + b)² in Yacas.
18.   factor poly  : factorise the polynomial x² - 1 in Yacas.
19.   diff  : calculate the derivative of sin(x) in Yacas.
20.   taylor  : calculate the Taylor development of cos(x) in Yacas.
21.   Examples  : launches randomly the calculation of one of the examples of Yacas.
22.   << Tests btns>>  : marker of the group of buttons << Buttons under test>>. This button doesn't execute any action, it serves just as visual separator between the groups of buttons.
23.   factor poly 2?  : other example of factorisation of polynomials.
24.   YACAS d  : launches Yacas directly (without using a batch file).

8.5.2 Test of the buttons 

Under Windows 2000  :

1.  All common and specific button tests work in a command window.
2.  Yacas doesn't work in a shell of Emacs (error ?Invalid Describer?).