similar to: ANOVA

Hi, how can I treat data organised in classes and frequencies? Ex. class frequency 20-23 9 23-25 7 26-28 5 29-31 5 32-34 3 Thanks Angelo Scozzarella

Hi, Why this function doesn't work? function (x) { if (is.factor(x)) { if (!is.ordered(x)) { warning("La mediana non si puo' calcolare!!!") return(NA) } me <- median(unclass(x)) if (me - floor(me) != 0) { warning("Mediana indeterminata") return(NA) } else

Hi, I want to sort a matrix by a specific variable without changing the row binding between variables. Ex. Name Sex Age Fred M 24 John M 18 Mary F 21 ordered by Age Name Sex Age John M 18 Mary F 21 Fred M 24 Thanks Angelo

Hi, I want to calculate the T-Test from means and sd. How can I do it? Thanks Angelo Scozzarella

Hello, I have this command: x.axis <- seq(from=0.5, to=4.5, length.out=13112) How can I which of the x.axis components is the closest to a given value, for example 3.2? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s- SPAIN Centro de Investigaci?n

Dear R friends, I'd like to generate random sample (variable size and range) without a specified distribution but with given mean and standard deviation. Could you help me? thanks in advance Angelo

Hello, I am creating a plot and I would like to know how to put this expression to the y axis ?mol/10^6 cells I've tried some combinations using the expression() function, but none of them worked. Any idea? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de

Hello, I have a vector, lets say x <- 1:50 I would like it to be cut at certain points, being for example 1:5, 6:11, 12:17, ... How can I do it? I have tried the cut() function, but I don not know how to place the cutting points properly. Best regards, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona

Hello, I have a text file with this structure: # File created = Thursday, August 28, 2008 3:33:02 PM GMT # Data set = 373 2 1 C:\Bruker\TOPSPIN GABRMN # Spectral Region: # LEFT = 4.5 ppm. RIGHT = 0.5 ppm. # # SIZE = 13111 ( = number of points) # # In the following ordering is from the 'left' to the 'right' limits! # Lines beginning with '#' must be considered as

Hii, I will save the elements of the vector median<-with(x, tapply(V3, grup, median)). The output of this vector is: 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450 475 500 17.8 17.8 17.5 17.8 17.7 17.6 17.7 17.6 17.8 17.7 17.6 17.7 17.8 17.7 17.8 17.8 17.8 17.8 17.7 17.7 Can anybody help me how to do it. I will save it to a text file...

Hello, I would like to combine different label sizes in the same x-axis, for example 1 2 3 4 5 6 7 8 9 How can I do it? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s- SPAIN Centro de Investigaci?n Biom?dica en Red en Bioingenier?a, Biomateriales y

Hello, I have two vectors, one with 13112 points and the other one with 10909. I wonder if there is a way to interpolate the data so the shorter vectors has the same number of points as the longer one. Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s-

Hello, I have carried out an lda analysis using the lda function of MASS package. I have plotted the LD1xLD2 to represent the data. Now I would like to get the centroids for each group of data and plot it on the LD1xLD2 graph. How can I get the centroid value from the lda object? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la

Hello, I have the next function call: lme(fixed=Error ~ Temperature * Tumour ,random = ~1|ID, data=error_DB) which returns an lme object. I am interested on carrying out some kind of lsmeans on the data returned, but I cannot find any function to do this in R. I'have seen the effect() function, but it does not work with lme objects. Any idea? Best, Dani -- Daniel Valverde Saub? Grup

Hello, I would like to convert an Rd object to a latex file, so that I can put it in my thesis. How can I do it? I tryed latex(), but it only works for code... Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s- SPAIN Centro de Investigaci?n Biom?dica en

Hello, I would like to place some text that should appear in the same position of the graphic device, preferably outside the plotting area, regardless the x and y axes limits. How can I do this? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s- SPAIN

Hello, I have a sequence of numbers: seq(1:50) and I would like to have all the possible combinations with this numbers without repeating any combination: 11, 12, 13, ... ,22,23,24,... How can I do it? Best, Dani -- Daniel Valverde Saub? Grup de Biologia Molecular de Llevats Facultat de Veterin?ria de la Universitat Aut?noma de Barcelona Edifici V, Campus UAB 08193 Cerdanyola del Vall?s-

Hello, I am trying to perform a glm analysis on a 68x13113 matrix (named data.spect). The first column corresponds to the predictor (data.spect[,1]) and the rest to the response variables (data.spect[,2:13113]). When I try this code glmObject <- glm(data.spect[,2:13113]~data.spect[,1]) I get the following error: Error: (subscript) logical subscript too long Could anyone help me on

Hello, I have a dataframe named myMatrix with the structure Treatment Time Cr mIb ... Being the treatment and time the predictors and Cr, mIb and so on the response variables. When I call Cr.aov <- aov(Cr~Treatment, data=myMatrix) I got this error: Error in storage.mode(y) <- "double" : invalid to change the storage mode of a factor In addition: Warning message: In

Hello, I want to perform an lme on a database with this structure: ID Sequence Temperature Tumour Error 1 5 0 1 8.721872e-08 1 5 0 2 8.695348e-08 1 5 0 3 2.019604e-13 1 5 37 1