How to plot a function dependent on no. of iterations, provided it plots till nth iteration where n is the number where the function is converged?

3 次查看（过去 30 天）

显示更早的评论

ISHA ARORA 2022-1-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1638190-how-to-plot-a-function-dependent-on-no-of-iterations-provided-it-plots-till-nth-iteration-where-n

编辑： VBBV 2022-1-29

采纳的回答： VBBV

在 MATLAB Online 中打开

Hello All,

I am trying to plot a function vs no. of iterations. In the for loop, i have given the convergence condition, but I am unable to plot for f(x) vs no. iterations (till convergence). Please help.

Its of the form:

for m=1:n
    pu(m)=(-1)^m)/((2*m)+1))*(exp(-((2*m)+1)))
    e = e+pu;
    if (abs(pu)/e)<(10^(-6))    %convergence check
        break
    end
    
end
hold all
plot(1:n,pu,'linestyle','none','marker','*')

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

VBBV 2022-1-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1638190-how-to-plot-a-function-dependent-on-no-of-iterations-provided-it-plots-till-nth-iteration-where-n#answer_883885

编辑：VBBV 2022-1-29

在 MATLAB Online 中打开

n= 10;

e = 0;

for m=1:n

pu(m)=(-1)^m/((2*m)+1)*(exp(-((2*m)+1)))

e = e+pu(m);

if (abs(pu(m))/e)>(10^(-6)) %convergence check

break

end

pu = -0.0166

pu = 1×2

-0.0166 0.0013

pu = 1×3

-0.0166 0.0013 -0.0001

pu = 1×4

-0.0166 0.0013 -0.0001 0.0000

pu = 1×5

-0.0166 0.0013 -0.0001 0.0000 -0.0000

pu = 1×6

-0.0166 0.0013 -0.0001 0.0000 -0.0000 0.0000

pu = 1×7

-0.0166 0.0013 -0.0001 0.0000 -0.0000 0.0000 -0.0000

pu = 1×8

-0.0166 0.0013 -0.0001 0.0000 -0.0000 0.0000 -0.0000 0.0000

pu = 1×9

-0.0166 0.0013 -0.0001 0.0000 -0.0000 0.0000 -0.0000 0.0000 -0.0000

pu = 1×10

-0.0166 0.0013 -0.0001 0.0000 -0.0000 0.0000 -0.0000 0.0000 -0.0000 0.0000

hold all

plot(1:n,pu,'linestyle','-','marker','.')

Check the convergence condition

7 个评论
显示 5更早的评论隐藏 5更早的评论

VBBV 2022-1-29

在 MATLAB Online 中打开

legend(mrkr{cidx},legendInfo)

Put this line inside the inner for loop. After legendInfo. Everytime the inner for loop exits, it's over written with initial values for mrkr and clr index.

VBBV 2022-1-29

编辑：VBBV 2022-1-29

在 MATLAB Online 中打开

u=zeros(n,npoints); % change also This line in beginning 
u(m,cidx)=pu(m);
hold all 
plot(1:m,u(1:m,cidx),'linestyle','none','marker',mrkr{cidx},'Color',clr{cidx})

You also need to change these two lines inside the for loop. As you can see the u value is dependent on pu which is again varying with each outer iteration of for loop.

请先登录，再进行评论。