[R] Transparent colors OR two series on one histogram
Hi, I want to be able to plot a single histogram of a measured trait with trait values from two conditions on the same histogram to allow easy comparison. I have previously done this in excel by plotting the two series on a single bargraph having calculated frequencies in bins. You then get one condition plotted immediately to the right of the other. I hope that makes sense? I don't know if this is possible in R? If not, I could plot the second one on top of the first i.e. hist(x) hist(y,add=TRUE) but i would need to set one as having a semi-transparent color so that where the two sets of are plotted on top of each other, you can see the frequency of the first series 'behind' the second. Can anyone help me do this? It would be another step towards never using excel again :) Thanks __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Specifying error terms in aov and lme
I need to specify error terms properly in a mixed-effects anova model. I know you can add error terms in aov using Error and can specify random factors in lme but I am not sure how these get treated. When making the calculations for fixed and random factors, are the correct error terms used and how can you get aov or lme to use different error terms for fixed and random effects? I'm basing the need for this on this table from Zar, Both fixed factors - both tested against error Both random factors - both tested against interaction MS 1 fixed - interaction MS 1 random - replicate MS for random you can use error if the interaction is not significant (I have been told). I want to make sure that the correct error terms are always being used. Thanks for your help -- Nathaniel Street University of Southampton Plants and Environment Lab School of Biological Sciences Basset Crescent East Southampton SO16 7PX tel: +44 (0) 23 8059 4387 fax: +44 (0) 23 8059 4459 [EMAIL PROTECTED] http://popyomics.biol.soton.ac.uk/~nat ICQ: 203465793 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Labelling contour lines
I am using contour to draw contour lines onto a photo (jpeg) of a leaf on a white background. I have two problems: 1) The contour gets plotted at right angles to the jpeg image. I guess this is a problem of referencing the start and end points of the image matrix but I can't see how to over come this other than loading in a second image that has been rotated 90 degrees and plotting the contours on the non-rotated one (obviously a bad solution) 2) I want to be able to select a single contour after they have been drawn. I know there is contourLines but I can't see how to relate this to the contours plotted. In matlab there is a function to label contours so that they can be called by their contour label in order to get the coordinates of the contour. Can this be done in R. Sorry if these are easy / stupid questions. I'm new to all this. I have searched previos posts but can't find the answers I need and I would rather be able to use R than matlab. Thanks -- Nathaniel Street University of Southampton Plants and Environment Lab School of Biological Sciences Basset Crescent East Southampton SO16 7PX tel: +44 (0) 23 8059 4387 fax: +44 (0) 23 8059 4459 [EMAIL PROTECTED] http://popyomics.biol.soton.ac.uk/~nat ICQ: 203465793 __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Printing multiple graphics devices
Hi I'm using a function (arrayview from the maanova package) that produces 12 plots, all in separate windows. How can I get each one to print to a jpeg file as the plots are produced? Alternatively, is it possible to get dev.print (jpeg.) to print all open graphics devices to separate windows? Thanks in advance, Nat Street -- Nathaniel Street University of Southampton Plants and Environment Lab School of Biological Sciences Basset Crescent East Southampton SO16 7PX tel: +44 (0) 2380 594387 fax: +44 (0) 2380 594269 [EMAIL PROTECTED] http://www.soton.ac.uk/~nrs298 ICQ: 203465793 __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
