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Hello I have this problem. I have a large matrix of this sort: > prova [,1] [,2] [,3] [,4] [1,] 3 3 3 3 [2,] 3 3 3 1 [3,] 1 3 3 3 [4,] 1 1 1 3 [5,] 3...

Hello everybody I have this problem: I need to match an addresses database F1 with the information contained in a toponymic database F2. The format of F1 is given by three columns and 800 rows, with the columns being: A1...

Dear Arun, please excuse me for this late reply, we had to stop working on this temporaririly. Let me reproduce here two examples of rows from F1 and F2 (sorry, but with dput() I am not able to produce a...

Dear Richard, Martin, Dimitris and Domenico thank you very much for your help. I must say that the fastest procedure appears to be the one suggested by Richard > This runs pretty quickly: > unSpells <- nrow(Atr) - apply(Atr,2,function(x...

Dear R-Users I have data on bilateral trade flows among countries in the following form: > head(dataTrade) iso_o iso_d year FLOW 1 ABW AFG 1985 NA 2 ABW AFG 1986 NA 3 ABW AFG 1987 NA 4...

Hello, I have the following problem. I am running simulations on possible states of a set of agents (1=employed, 0=unemployed). I store these simulated time series in a matrix like the following, where rows indicates time periods, columns...

Hello, I have a sample of 1327 locations, each one idetified by an id and a numerical code. I need to build a spatial matrix, say, M, i.e. a 1327x1327 matrix collecting distances among the locations. M(i,i...

Dear Arun below I present the issue in dput(). Sorry for not being able to do it before. In particular, following your previous suggestions, the databases are as simplified as possible (all capital letters, the issue odd/even solved by...

Hi Sarah, thanks a lot. In this line: result.m[cbind(factor(result$f_cell), factor(result$f_cell_neigh))] <- result$distance I had a problem with cbind(factor .. : the assignement to the [i,j] element of the matrix did...

Hi Duncan thanks a lot for your suggestion. I followed the suggestion of Sarah (the first on the thread) and solved my problem I will keep into account you suggestion anyway Mario On Fri, May 26, 2017 at 2:20...

Dear Marc thank you so much! One thing: writing xx=[1,2,1,1] is not a typo: I read it as the count of runs of different length starting from 1. In "prova" I have 1 run of length...

Dear Sarah thank you very much. I used "crosstab" and it worked, xxx<-crosstab(dataTrade$iso_o,dataTrade$iso_d,dataTrade$FLOW,type="sum",na.rm=TRUE) All the best Mario On Fri, May 26, 2017 at 2:15 PM...

Hello Sarah thanks a lot for your advice. I followed your suggestions unitl the creation of "result" The allocation of the values of result$distance to the matrix result.m, however ,does not seem to work: it produces a matrix...

Thanks a lot for your suggestion. I followed the suggestion of Sarah (the first on the thread) and solved my problem I will keep into account you suggestion anyway Mario On Fri, May 26, 2017 at 3:28 PM, S...

Hi Ulrik thanks a lot for your suggestion. I followed the suggestion of Sarah (the first on the thread) and solved my problem I will keep into account you suggestion anyway Mario On Fri, May 26, 2017 at 2:17...