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Vary Interpolation or add specific number to eliminate unwanted points?


Hello, Is there any way to vary interpolation or adding specific number to eliminate unwanted points. For example, in my case the arrows in the opposite direction. In other words, what I should add in this: Interpolation[data]

In[5]:= data = MapThread[{{#1, #2}, #3} &, {z, x, ffun}]

Out[5]= Out[5]

In[6]:= q = Interpolation[data]

Out[6]= InterpolatingFunction[{{0.336, 0.352}, {0.439, 0.455}}, <>]

In[7]:= gradient[a_, b_, i_] :=  
 Evaluate[Grad[q[a[[i]], b[[i]]], {a[[i]], b[[i]]}]]

In[8]:= gr = 
 Reap[Do[Sow[{z[[i]], x[[i]], gradient[z, x, i]}], {i, 
     Length[z]}]][[-1, 1]]

Out[8]= Out[8]

In[9]:= vunorm = Im[gr[[;; , 3]]];

In[10]:= vn = Normalize /@ vunorm;

vnn = Table[{z[[i]], x[[i]], vn[[i]]}, {i, 1, Length[vn]}]

Out[11]= Out[11]

In[12]:= list = Partition[Flatten[vnn], 4];

In[13]:= vl = 
 ListVectorPlot[list, VectorScale -> Small, VectorPoints -> {25, 25}]

For more details, please see the attachment. Many thanks in advance!

POSTED BY: Ghady Almufleh
2 months ago

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