Dear BioC, I'm trying to use de image function to generate spatial plots of spot statistics. I tried using the RG object, > image(RG[, 1], xvar="maRb", bar=TRUE) Error in image.default(RG[, 1], xvar = "maRb", bar = TRUE) : 'z' must be a matrix What should I do? Thanks, Priscila -- Priscila Grynberg, B.Sc., M.Sc. Doutoranda em Bioinformática (Bioinformatics D.Sc student) Laboratório de Genética Bioquímica Universidade Federal de Minas Gerais Tel: +55 31 3409-2628 CV: http://lattes.cnpq.br/8808643075395963 [[alternative HTML version deleted]]

I suppose so, but I don't know what to do! Thanks. Priscila On Tue, Jan 6, 2009 at 11:00 AM, Pierre-Yves <pingou@pingoured.fr> wrote: > Priscila Grynberg wrote: > >> Dear BioC, >> I'm trying to use de image function to generate spatial plots of spot >> statistics. >> >> I tried using the RG object, >> >> image(RG[, 1], xvar="maRb", bar=TRUE) >>> >> >> Error in image.default(RG[, 1], xvar = "maRb", bar = TRUE) : >> 'z' must be a matrix >> > From ?image: > ## Default S3 method: > image(x, y, z, zlim, xlim, ylim, col = heat.colors(12), > add = FALSE, xaxs = "i", yaxs = "i", xlab, ylab, > breaks, oldstyle = FALSE, ...) > So I think you are not using the right arguments in your functions. > > Regards, > > Pierre > > -- Priscila Grynberg, B.Sc., M.Sc. Doutoranda em Bioinformática (Bioinformatics D.Sc student) Laboratório de Genética Bioquímica Universidade Federal de Minas Gerais Tel: +55 31 3409-2628 CV: http://lattes.cnpq.br/8808643075395963 [[alternative HTML version deleted]]

Hi Priscila, I am not completely sure what kinds of plots you want to generate, but you may want to have a look at the "image.RGList" function in package Ringo and, more general, at the package arrayQualityMetrics which generates diverse sets of plots for quality assessment of microarray data. Please read the manual pages of these two functions for details about how to use these functions with your RGList object. There are many other options for related plots in Bioconductor. Hope this helps. Regards, Joern Priscila Grynberg wrote: > Dear BioC, > I'm trying to use de image function to generate spatial plots of spot > statistics. > > I tried using the RG object, > > >> image(RG[, 1], xvar="maRb", bar=TRUE) >> > > Error in image.default(RG[, 1], xvar = "maRb", bar = TRUE) : > 'z' must be a matrix > > What should I do? > > Thanks, > > Priscila >