[R] How to catch error message

Dear R users, i would like to catch error message (coming after unsuccessful database query) so that the script will process further. How can I manage this? Thank you in Advance, Alla. __ R-help@r-project.org mailing list

[R] Error: unable to load shared library tcltk.so

/tcltk.so': libtcl8.4.so.0: cannot open shared object file: No such file or directory Error: package/namespace load failed for 'tcltk' Will be very greatful for you help. sessionInfo() R version 2.11.1 (2010-05-31) i686-pc-linux-gnu Dr. Alla Bulashevska Freiburger Center for Data Modeling Germany

[R] Error in png concerning 'type = cairo'

,type = cairo1) i become Warning message: In png(plot_name, width = 1600, height = 1200, type = cairo1) : type = cairo1 is deprecated Thank you for any hint, Alla Bulashevska. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo

[R] Unable to install Cairo package

Dear R users, I'm running R version 2.10.1. I tried installing the Cairo package and I got the following message: * installing *source* package ‘Cairo’ ... checking for gcc... gcc -std=gnu99 checking for C compiler default output file name... a.out checking whether the C compiler works... yes

[R] Align two protein sequences using BLAST

Dear R users, I would like to align two protein sequences using BLAST (bl2seq). The question is whether this programm have been implemented in R. Thank you for your help, Alla. __ R-help@r-project.org mailing list

[R] expression and font type of bold

Dear R users, i would like to have expression on my plot written in bold italic font and use following: text(0.01,70,expression(bolditalic(r^2==0.67)),pos= 4) However, only the letter r appears bold and italic, but not the whole expression. How should i change it? Thank you for your help, Alla.

[R] tick marks on fold change versus fold change plot

Dear R users, i try to produce the fold change versus fold change plot where i have the values for x and y ranging from 0.01 to 100. So i start with plot(x,y,xlim=c(0.01,100),ylim=c(0.01,100), axes=F). Then i would like both axes to have tick marks as c(0.01,0.1,1,10,100) but they should appear

[R] Error system is computationally singular by using function dmvnorm

Dear R users, i try to use function dmvnorm(x, mean, sigma, log=FALSE) from R package mvtnorm to calculate the probability of x under the multivariate normal distribution with mean equal to mean and covariance matrix sigma. I become the following Error in solve.default(cov, ...) : system is

[R] Parameter Estimation of Inverse Gamma distribution

Dear R users, i am searching for the solution of this problem in R: how to estimate the shape and scale parameters of Inverse Gamma distribution. Your views and help will be appreciated. __ R-help@r-project.org mailing list