Hi pals,

I have spread sheet data for X, Y, U, and V, where X and Y represent position and U and V represent the corresponding horizontal and vertical velocity respectively.
I have no knowledge on MATLAB however I have to use matlab to get the plot.
I am expecting the codings for the plot. Related suggestions are highly welcome.

I greatly appreciate your valuable inputs in this regards.


foinme
 

Usually if you go to help button on Matlab it will guide you to plot anything. You will learn to do it by yourself and its easy as well. Just you the help button.

Hi Nishedh,

I have tried the help tool too. The example used is for a given function and in my case I have data set instead of function. I used the following coding but neither I got the arrowhead for the vectors nor did I see any slope of the vector lines. All I could get was series of vertical lines.

X=data(:,1)
Y=data(:,2)
U=data(:,3)
V=data(:,4)
scale=0.2
figure(1)
quiver(X,Y,U,V, scale)
colormap hsv

Is your data set in Excel or .csv format?
There is a way to import the data into matlab if it's in Excel
If not, you will have to list them in Matlab manually. What's the exact question?
Reply fast and I can help you.

Thanks Guitar Daku,

My data is in notepad. I copied the data and pasted in m file. Then I used the above code for quiver plot.
1.  I could not see the arrow
2. Since value of U and V is provided for every location, I was expecting to see the slope of vector , but I could not see that
3. I can see only vertical lines in the plot.

If you provide me your email, I will attach the m file with data on it.



foinme

Email me at passinthru05 aT hot mail

I have attached the m file in the above email address.

foinme

I don't see it. it's passinthru then zero 5 btw.

nvm, i see it. it went in junk for some reason.

Got yr m file. What is the last column for? The one ending with 0.310085E+02  .
That column has not been used. Shouldn't there be just 4 columns? Or am I missing something?

The last two columns are of no use in our case.

I put the result obtained from my result and copied on m file. Only the first four columns are of use in our case.

 

 

foinme

Hi guitar daku,


The first and second columns represents position (x,y) and the third and the fourth column represents velocity (u,v). Rest of the columns, we don't need in this case


foinme

PLEASE ................, 

Sorry but can't solve it. Data has been input correctly; play around with the syntax more. I can't figure it out though. Good luck.

Hey

Thanks Nishedh, Guitar daku and Nepali Gundo,

One thing you can do is to set the x and y axis maximum and minimum.