Integrate a line in a 3D plot.

[DavideZ95]

As you can see in the picture i have a cloud of point of my object. I have found the principal direction of the object thanks to the PCA. I would like to add this line in the graph but it's seem impossibile. I have the slope e and a point of the line.

does anyone have a suggestion?

[Bob_Schor]

Please attach (a) the VI (or VIs) that produced this plot and (b) the data set that gets plotted.  I'm a little confused how you plan to plot a line in 3-D space given only two parameters (a point on the line and a "slope with respect to ???").

Bob Schor

[alexderjuengere]

use several x,y,z cursors drawn on the 3d graph to represent the line?

[DavideZ95]

Thanks for the answer.

Ok, this is the VI. 

yes, it's only two parameters beacause i don't care for z data. i mean, i want to plot the line in plane XY. So this way a point and the slope should be enough.

The point is the mean X,Y,Z and the slope is the result of the PCA.

I would like to see that line in the same plot of the cloud of point.

[DavideZ95]

it could be a good idea, but is there a way to set the x,y,z origin from the code?

[alexderjuengere]

please attach the missing sub.vi

before uploading,

run your main.vi, so there should be meaningful data in the array, graphs etc.

 click " Make Current Value Default" , then save.

[alexderjuengere]

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@DavideZ95 wrote:
it could be a good idea, but is there a way to set the x,y,z origin from the code?

origin in terms of what? in terms of the 3d Surface Plot?

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[alexderjuengere]

so, I created my own sample data for demonstration... 

@DavideZ95 wrote:

yes, it's only two parameters beacause i don't care for z data. i mean, i want to plot the line in plane XY. So this way a point and the slope should be enough.

I don't think so

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@DavideZ95 wrote:

The point is the mean X,Y,Z and the slope is the result of the PCA.

I would like to see that line in the same plot of the cloud of point.

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I'd say this mean will not be in the X,Y plane as Z is very likely to be unequal to 0

what about the line points which are inside your actual 3d point cloud?