converting float to integer makes problem
16 ビュー (過去 30 日間)
古いコメントを表示
My code is:
% Uzunluk(cm)
e=2.25; a=15.75; b=13.5; g=44.25; L=90.50;
%Mesnet yükleri(kg)
C=3750; B=3750; A=6500; D=3750;
%Yayılı yükler(kg/cm)
q1=2*C*(L-e)/(L^2); q2=2*A*(L-a)/(L^2); q3=2*B*(L-a-b)/(L^2); q4=2*D*(L-a-b-g)/(L^2);
%Süperpozisyonla ayrılmış parçaların momentleri(kg.cm)%
%M1=-q1*(x^2)/2; M2=-q1*(x^2)/2+ C*(x-e);
%M3=-q2*(x^2)/2; M4=-q2*(x^2)/2+ A*(x-a);
%M5=-q3*(x^2)/2; M6=-q3*(x^2)/2+ B*(x-a-b);
%M7=-q4*(x^2)/2; M8=-q4*(x^2)/2+ D*(x-e);
% Süperpozisyonla ayrılan parçaların birleştirilmesi sonucu net
% momentler(kg.com)
for x=0:0.025:L
y=int64(40*x)+1;
if (0<=x) && (x<=e)
y
M(y)=-(x^2)/2*(q1+q2+q3+q4);
elseif (e<x) && (x<=a)
y
M(y)=-(x^2)/2*(q1+q2+q3+q4)+C(x-e);
elseif (a<x) && (x<=a+b)
M(y)=-(x^2)/2*(q1+q2+q3+q4)+C(x-e)+A(x-a);
elseif (a+b<x) && (x<=a+b+g)
M(y)=-(x^2)/2*(q1+q2+q3+q4)+C(x-e)+A(x-a)+B(x-a-b);
elseif (a+b+g<x) && (x<=L)
M(y)=-(x^2)/2*(q1+q2+q3+q4)+C(x-e)+A(x-a)+B(x-a-b)+D(x-a-b-g);
end
end
Runner finished first if loop and after that even if it calculates the value of y as 92 it gave me that error:
Array indices must be positive integers or logical values.
Error in untitled2 (line 23)
M(y)=-(x^2)/2*(q1+q2+q3+q4)+C(x-e);
error.
How can i fix that?
0 件のコメント
採用された回答
Walter Roberson
2023 年 12 月 7 日
int64(y);
That line takes a value of y as input, and creates a uint64 equivalent of the input value, and stores the value in the semi-hidden variable named ans and then otherwise throws away the result because the semi-colon tells MATLAB not to display the output.
One thing it does not do is store the result into y . If you want the result to be written into y then you need to store the result into y
4 件のコメント
Walter Roberson
2023 年 12 月 7 日
x = (y-1)/40;
That is not going to be an integer.
M(y)=-(x^2)/2*(q1+q2+q3+q4)+C(x-e);
but x-e is used as a subscript
C=3750; B=3750; A=6500; D=3750;
... a subscript into the scalar value C
Reminder: MATLAB has absolutely no implied multiplication. Not anywhere . Not even inside the internal language of the Symbolic Mathematics toolbox.
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Characters and Strings についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!