X axis of feather plot

I plotted vector of wind velocity given by U and V , as

 feather(U,V)

Is there a way to provide the x axis in such a way that I want to put the date on x - axis which so far I don't manage to do. Is there any alternative in having this? Am having trouble on this and any help is highly appreciated.

Answer 1

[Kelly Kearney]

Use quiver instead; it allows you to specify explicit x and y coordinates for each vextor:

quiver(date, zeros(size(U)), U, V);

[Ede gerlderlands]

Yes I can . Is there a way to show the magnitude of the vector other than the length of the lines in quiver plots?

[Kelly Kearney]

Not quite sure what you mean... do you want to add something else to the plot (like color, perhaps)? Or do you want to replace the quiver/feather plot with an entirely different style of plot?

[Ede gerlderlands]

I mean I want to plot the magnitude of the vector superimposed on the flow vector . Is that possible to do?

[Kelly Kearney]

Still not clear. The quiver plot is showing the magnitude and direction of whatever your U and V represent, which I'm assuming in your case is the flow. If you need something else, you're going to have to explain your data in more detail.

[Ede gerlderlands]

Yes, quiver shows the magnitude of a vector by the length of it arrow. What am saying is that if it is possible to draw the magnituden of the vectors at each time plus the direction of the vector for the corresponding magnnitude. . I don't know if am that clear

[Kelly Kearney]

Nope, still no idea. Let's try an example; this is the example data from the feather documentation; all I've done is add corresponding time data.

 theta = (-90:10:90)*pi/180; 
 r = 2*ones(size(theta));
 [u,v] = pol2cart(theta,r);
 t = datenum(now) + (1:length(u));

 quiver(t, zeros(size(u)), u, v);
 set(gca, 'xtick', t(1:2:end));
 datetick('keepticks');

So now, at each time along the x-axis, there is a vector showing the magnitude and direction of the data at that time. If you want something else, perhaps you can include a sketch or something? Otherwise, I guess we'll have to wait for someone else to chime in who possibly understands what you're asking.

[Vignesh Ramakrishnan]

Can we have a feather from an arbitrary line instead of the x-axis specifically?