I'm not quite sure what you are looking for, so here are some techniques:
Load Data as table
[filename, folder] = uigetfile({'.csv'},'F:\3-PIV_Experimental_Data\Outlet_110\ABCD_DesignPoint\Profile_Plot\Center_ABCDlineplot\Average_VectorStiching\');
Data = readtable(fullfile(folder,filename));
Create scatterplot of Velocity (m/s) versus the x and y coordinates (mm)
figure
scatter3(Data.x_mm__mm_,Data.y_mm__mm_,Data.V_m_s_,'.','CData',Data.V_m_s_);
xlabel('x (mm)')
ylabel('y (mm)')
zlabel('Velocity (m/s)')
If you are looking for a 2D plot of the velocity versus the x position when y = 118, then the following would work (note, the velocity is consistently zero.
whenx_between_n60_n391 = find(round(Data.x_mm__mm_)<=-60 & round(Data.x_mm__mm_)>=-391);
whenyis118 = find(round(Data.y_mm__mm_)==118);
index = intersect(whenx_between_n60_n391,whenyis118);
figure
plot(Data.x_mm__mm_(index),Data.V_m_s_(index))
xlabel('x (mm)')
ylabel('Velocity (m/s)')
Look at specific range:
figure
scatter3(Data.x_mm__mm_(3163:18170),Data.y_mm__mm_(3163:18170),Data.V_m_s_(3163:18170),'.','CData',Data.V_m_s_(3163:18170));
xlabel('x (mm)')
ylabel('y (mm)')
zlabel('Velocity (m/s)')
Try different range:
possiblestart_x = find(round(Data.x_mm__mm_)==-61);
possiblestart_y = find(round(Data.y_mm__mm_)==116);
start_index = intersect(possiblestart_x,possiblestart_y);
possibleend_x = find(round(Data.x_mm__mm_)==-391);
possibleend_y = find(round(Data.y_mm__mm_)==119);
end_index = intersect(possiblestart_x,possiblestart_y)
figure
scatter3(Data.x_mm__mm_(start_index:end_index(end)),Data.y_mm__mm_(start_index:end_index(end)),Data.V_m_s_(start_index:end_index(end)),'.','CData',Data.V_m_s_(start_index:end_index(end)));
xlabel('x (mm)')
ylabel('y (mm)')
zlabel('Velocity (m/s)')
