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+--- Thread: Input function - bad argument value (/thread-20063.html)
Input function - bad argument value - Amer7 - 06-07-2023 05:04 PM
Hi,
Folks I have a problem, my tasks became to complicated for me to calculate it all by hand ( I don't have enough time to complete the task)
How can I input a function like:
a1=d1*cos(alpha)+X
a2=d1*sin(beta)+Y
a3=d2*cos(beta)
a4=d3*sin(beta) ....
I can have Xx amount of these functions
And then tell the program to derivation of functions by variable that in input.
like alpha, beta, d1, d2
As you can see these are stored in matrix
The issue is when I write the input program it doesn't let me input the function.
How can I make this on Prime?
1. Issue is how do I make first input screen to let me enter the numbers of how many inputs spaces I need.
2. How do I input the function
RE: Input function - Amer7 - 06-07-2023 08:05 PM
https://youtu.be/qSY6RXvAHuw
I will try this tomorrow maybe with a string?
will give feedback
RE: Input function -Bad argument value - Amer7 - 06-08-2023 08:52 AM
EXPORT CAK()
BEGIN
LOCAL a,i,c,b;
INPUT({{a,[-1]}},"String");
return a;
END;
Value -1, -2 allow me to input my function d*cos(alpha)
Now I need to ask the user how many input he wants, and then proceed to new input screen with
input fields that user declared.
I have tried to set this with simple IF loop.
This part somehow doesnt work
Code:
BEGIN
LOCAL a,i,c,b;
INPUT({a},"test", {"a"}); /// Input from user number
PRINT();
if(a!=0)
THEN
INPUT({{b,c,[2]}},"b","c"); /// new inpt
PRINT(b);
PRINT(c);
ELSE
PRINT("input cant be 0"); /// Eror if user inputs 0
END;
END;The problem is if I enter 1, or any number it just throws me to the Error line, it doesnt offer me a new input screen.
EDIT; When i write it like this, I get input screen one, enter value, input screen two
Code:
EXPORT CAK()
BEGIN
LOCAL a,i,c,b;
INPUT({{a,[-1]}},"Varijabla");
INPUT({{b,[-1]}},"Varijabla");
i:=diff(a,b);
return(i);
END;I get as a result bad argument value
Inputs are D1*cos(Alpha), D1
When I'm in calculator (HOME) and I input diff(D1*cos(alpha),D1) i get correct value of cos(Alpha)
RE: Input function - bad argument value - Amer7 - 06-10-2023 08:02 PM
Is there any way to write the function in a matrix like
d1*cos(alpha),d2*cos(alpha)... without it returning an Error?
Ok, when I MAKEMAT(0,3,1) and then i view it, end I edit the 0 to be my function. I can save it to some variable like Ss0. It will appear in matrix menu. I vectorize it.
But when i do the diff(Ss0(1)/Ss1(1)) it again throws an error bad argument value
"(expression,variable=value) Error Bad Argument Value"
[attachment=12230]
[attachment=12231]
I need to make this but with functions in x and y
![[Image: 43b8c31f61f8b2bbe6f0df4d62012d8ba86ba420]](https://wikimedia.org/api/rest_v1/media/math/render/svg/43b8c31f61f8b2bbe6f0df4d62012d8ba86ba420)
vector by vector derivative matrix
Guys I found some code for jacobian matrix, it compiles no Errors, but I doesn't want to run
Code:
#cas
jacob2(args):=
// Jacobian Matrix by Salvo Micciché
// input vectorial expression, vector of variables
BEGIN
local argv, argc, mat, f, var, fn, fg, j, k, gr, vd;
argv:=args;
argc:=size(argv);
IF argc !=2 THEN
return "Input:[f1(x),f1(y),f1(z)...], [x,y,z,...]";
ELSE
f:=argv(1);
var:=argv(2);
fn:=size(f);
vd:=size(var);
IF fn:=1 THEN
fg:=grad(f(1),var);
f:=fg;
fn:=size(f);
END;
mat:=makemat(0,fn,vd);
FOR j FROM 1 TO fn DO // gradients
gr:=grad(f(j),var);
FOR k FROM 1 TO vd DO // items
mat[j,k]:=factor(gr(k));
END; // for k
END; // for j
return mat;
END; // if-else
END;
#endhttps://www.hpmuseum.org/forum/thread-3852.html
Ahhh, just type jacob() in home
EDIT: I think this solves my issue.