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-2,0,0,-1,"execstr(Misc_1000(15))"// Misc/Comment
//x_dialog:Enter comments
Scicos tutorial: Symbolic parameters.
Block parameters can be set using Scilab variables defined
in the context of the diagram. Using a variable instead of
a numerical value has many advatanges. In particular, if the
variable is used in more than one block.
We start by loading diagram2.cos from the previous tutorial.
o //OK
-2,0,0,-1,"execstr(Diagram_1000(8))"// Diagram/Load
//xgetfile:
diagram2.cos
-2,0,0,-1,"execstr(Edit_1000(2))"// Edit/Context
//x_dialog:You may enter here scilab instructions to define
lambda=.8
o //OK
-2,0,0,-1,"execstr(Misc_1000(15))"// Misc/Comment
//x_dialog:Enter comments
We have defined the Scilab variable lambda by setting it to 0.8
in the context of the diagram. We can now use this variable in
the definition of block paramters.
o //OK
0,275.5,154.1,1000,"void"// Block: 13 CLR_f
//x_mdialog: Set continuous SISO transfer parameters
1-lambda*s
1+s^2
o //OK
0,239.8,266.7,1000,"void"// Block: 32 SUPER_f
0,207.2,275.6,1001,"void"// Block: 3 GAINBLK
//x_mdialog: Set gain block parameters
-lambda
o //OK
-2,0,0,-1,"execstr(Misc_1001(15))"// Misc/Comment
//x_dialog:Enter comments
lambda is used here inside the Super Block.
o //OK
-2,0,0,-1,"execstr(Diagram_1001(16))"// Diagram/Quit
-2,0,0,-1,"execstr(Simulate_1000(5))"// Simulate/Run
-2,0,0,-1,"execstr(Misc_1000(15))"// Misc/Comment
//x_dialog:Enter comments
Changing the value of lamda in the context updates the
block parameters automatically.
o //OK
-2,0,0,-1,"execstr(Edit_1000(2))"// Edit/Context
//x_dialog:You may enter here scilab instructions to define
lambda=.1
o //OK
-2,0,0,-1,"execstr(Simulate_1000(5))"// Simulate/Run
-2,0,0,-1,"execstr(Misc_1000(15))"// Misc/Comment
//x_dialog:Enter comments
We see here the effect of changing the value of
lambda on the simulation. We see in particular the
effect on the Poisson process; lambda is simply the
Poisson rate.
o //OK
-2,0,0,-1,"execstr(Diagram_1000(5))"// Diagram/Rename
//x_dialog:Enter the new diagram name
diagram3
o //OK
-2,0,0,-1,"execstr(Diagram_1000(16))"// Diagram/Quit
//x_choose: Diagram has not been saved
1//Save
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