MATLAB Answers

ode45 too many input arguments

조회 수: 13(최근 30일)
Opariuc Andrei
Opariuc Andrei 2020년 12월 10일
댓글: Star Strider 2020년 12월 11일
so i got a function which i did as home work a few days ago tested it ,it ran ,now it doesn't want to run anymore i don't know how to fix it ,because i want to do a few more examples of ode45 and i get same error . The files have not been opened/modified since i wrote/tested them .
the function (which is saved correctly)
function dy=ec1L10(x,y)
dy=4*exp(0.8*x)-0.5*y
and the script
[x y]=ode45('ec1L10',0:0.25:4,2);
plot(x,y);grid on ; axis tight;

채택된 답변

Star Strider
Star Strider 2020년 12월 10일
To use your original construction, the single quotes are no longer acceptable..
Instead:
[x y]=ode45(@ec1L10,0:0.25:4,2);
would work.
However ‘ec1L10’ can be written as an anonymous function:
ec1L10 = @(x,y) 4*exp(0.8*x)-0.5*y;
so the rest of that code becomes:
[x y]=ode45(ec1L10,0:0.25:4,2);
plot(x,y);
grid on
axis tight
.
  댓글 수: 4
Star Strider
Star Strider 2020년 12월 11일
As always, my pleasure!
Thank you! Maybe some day ...

댓글을 달려면 로그인하십시오.

추가 답변(1개)

Steven Lord
Steven Lord 2020년 12월 10일
Let's check if you're using the ode45 function included in MATLAB. What does this function show? It should show just one function inside the toolbox/matlab/funfun subdirectory under matlabroot.
which -all ode45
/MATLAB/toolbox/matlab/funfun/ode45.m
  댓글 수: 3
Opariuc Andrei
Opariuc Andrei 2020년 12월 11일
i removed and all my ode45 work fine . thx :)

댓글을 달려면 로그인하십시오.

태그

제품


릴리스

R2020a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by