[R] student looking for help with assignment in R

Jim Lemon drjimlemon at gmail.com
Fri Nov 13 11:08:04 CET 2015

Hi Christopher,
If you want to plot the movements of cells, perhaps a look at the help page
for color.scale.lines (plotrix) will get you started.


On Fri, Nov 13, 2015 at 8:47 PM, PIKAL Petr <petr.pikal at precheza.cz> wrote:

> Hi
> 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
> tempx<-read.table("clipboard")
> tempy<-read.table("clipboard")
> I can make a plot
> plot(tempx[,1], tempy[,1])
> lines(tempx[,1], tempy[,1])
> or
> 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.
> Cheers
> Petr
> > -----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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