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Thread: MatLab help needed

  1. #1
    Join Date
    May 2018
    Posts
    0

    MatLab help needed

    Hi
    Please, help me with this one:
    Program Eyler;
    Uses
    Crt;
    Const
    H=0.1;
    Var
    X,y:array[0..100] of real;
    I:integer;
    Function f(x,y:real):real;
    Begin
    F:=0.218*(x*x+sin(1.6*x)+0.718*y);
    End;
    Begin
    Clrscr;
    For i:=0 to 9 do
    Begin
    X[0]:=0.2; y[0]:=1.2;
    X[i+1]:=x[i]+h;
    Y[i+1]:=y[i]+f(x[i],y[i])*h; {Eiler's formula}
    Writeln (x[,I,]=, x[i]:3:2);
    Writeln (y[,I,]=, y[i]:3:2);
    End;
    Readln;
    End.

    Results
    Х[0]=0.20 y[0]=1.20
    Х[1]=0.30 y[1]=1.29
    Х[2]=0.40 y[2]=1.40
    Х[3]=0.50 y[3]=1.52
    Х[4]=0.60 y[4]=1.65
    Х[5]=0.70 y[5]=1.79
    Х[6]=0.80 y[6]=1.95
    Х[7]=0.90 y[7]=2.12
    Х[8]=1.00 y[8]=2.31
    Х[9]=1.10 y[9]=2.52
    Х[10]=1.20 y[10]=2.75

    Thanks.

  2. #2
    Join Date
    May 2018
    Posts
    0

    Re: MatLab help needed

    I've been looking for some instant MatLab sections on MathsNinja and MathsGurus, Perhaps, any ideas on the process. I know that it will take perhaps several pages to write down in detail.
    Last edited by 2kaud; May 10th, 2018 at 08:32 AM. Reason: Removed advertising link

  3. #3
    Join Date
    May 2018
    Posts
    0

    Re: MatLab help needed

    Update:

    Found the Euler Method Matlab Code thread on MathWorks. Solved.

  4. #4
    Join Date
    May 2018
    Posts
    0

    Re: MatLab help needed


  5. #5
    Join Date
    Apr 2020
    Posts
    0

    Re: MatLab help needed

    Quote Originally Posted by terencemall View Post
    Nice to know that you've found a timely solution to your matlab programming problem. I've followed the link, which you've provided by you and have found some interesting coding advice I'm about to use in my code.

  6. #6
    Join Date
    Sep 2020
    Posts
    13

    Re: MatLab help needed

    Common errors in matlab:-
    1. Error using * Inner matrix dimensions must agree.

    2. Index exceeds matrix dimensions.

    3. Subscript indices must either be real positive integers or logicals.

    4. The expression to the left of the equals sign is not a valid target for an assignment.

    5. Subscripted assignment dimension mismatch.

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