[R] student looking for help with assignment in R

PIKAL Petr petr.pikal at precheza.cz
Fri Nov 13 10:47:41 CET 2015


What does it mean "to monitor". If you want to compute path length for each cell it seems to me that it is a simple problem of trigonometry

sqrt(a^2+b^2) = c

is a length of a segment between two points. a and b can be computed by differencing x and y coordinates.

If I read your data

I can make a plot
plot(tempx[,1], tempy[,1])
lines(tempx[,1], tempy[,1])


plot(tempx[,1], tempy[,1])
lines(tempx[1:3,1], tempy[1:3,1])

to see how one cell is moving

However it seems to me that your assignment is a homework and there is no-homework policy on this list, so it is enough from me for the time being. Sorry if it is not homework but anyway as a poor chemist I cannot help you further.

Besides, there was no r script attached.


> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of
> Clarkson, Christopher
> Sent: Friday, November 13, 2015 12:07 AM
> To: r-help at R-project.org
> Subject: [R] student looking for help with assignment in R
> Hello,
> I am a student and I only have basic knowledge of R. I have been given
> the task of having to monitor cells' migration in 2 dimensions. I have
> been given 2 files one containing the the X-coordinates and the other
> contains the Y-coordinates of the cells. There are 50 cells and there
> movement both longitudinally and latitudinally has been documented 100
> times- to determine their overall trajectories.
> I have tried to get help on both Stackexchange Overflow and
> biostars.org but since it is not classic bioinformatics neither have
> yielded much success.
> I was hoping someone could take a look at the R code I have tried thus
> far to see where I'm going wrong.
> Attached are the files and the r-script that I have been trying to
> run.... any changes in strategy would be welcome especially if they are
> more practical and simpler than what I currently have.
> Thanks.
> If this is not the type of message that I should send to you can you
> recommend somewhere else that I can get help...

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