stream line _issue

When i plot the streamline using the code. I am unbale to get the stream lines for the complete field as shown in the figure.

Kindly let me know the way to get stream lines all over the plot.

[x,y] = meshgrid(0:0.1:1,0:0.1:1);
u = x;
v = -y;
>> figure
quiver(x,y,u,v)

startx = 0.1:0.1:1;
starty = ones(size(startx));
streamline(x,y,u,v,startx,starty)

Answer 1

[Ameer Hamza]

In this case, you can try something like this.

[x,y] = meshgrid(0:0.1:1,0:0.1:1);
u = x;
v = -y;
figure
quiver(x,y,u,v)
startx = 0:0.02:1; % <=== chage the number of points in startx
starty = ones(size(startx));
streamline(x,y,u,v,startx,starty)

For the plot in your other question, you can also try to increase the number of points in the startx vector, and accordingly the number of points in starty. I am not sure why I didn't try on that question. Maybe there was some other issue. You can try it again.

[MS]

thanks for the help. it is filled up now here. Since, you changed the startx limt from 0.1 to 0. i think, the issue with the other question is diffrent. I chaged the values still the same.

 rg = linspace(0, max(R), 100);
    cg = linspace(0, max(C), 100);
    [Rg, Cg] = meshgrid(rg, cg);
    Fg = griddata(R, C, F, Rg, Cg);
   Ug = griddata(R, C, U, Rg, Cg);
   Vg = griddata(R, C, V, Rg, Cg);
 xstart = linspace(0, max(R), 1000);
    ystart = 0.005*ones(size(xstart));
    s = streamline(Rg,Cg,Ug,Vg,xstart,ystart);
    [s.Color] = deal('g');

[Ameer Hamza]

Sometimes the lines of streamlines seem to terminate arbitrarily. Even though the quiver works fine at those points. I am not sure why this thing happens. Can you try this

ystart = 0.01*ones(size(xstart));

[MS]

sure, thanks. i will update the results.

[Ameer Hamza]

Sorry! I meant to write

ystart = 0.01*ones(size(xstart));

Can you try this and see the result.

[MS]

Thanks, I triedd with even less value. The figure i attached in the previous comment is the result using the value.

ystart = 0.005*ones(size(xstart));

[Ameer Hamza]

No, I am asking about increasing the value a little bit.

[MS]

okay sorry, i will try it.

[MS]

I tired it. Still the same.

[Ameer Hamza]

I am not sure what else can be done to make it correct.

[MS]

Thank you. It may be a mistake of the data file.