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hello, i need the data from hist() but i do not want the plot. e.g. z=hist(data)$counts #returns absolute frequency but when i execute this command the plot occurs also. is it possible to suppress the plot...

Hi, i want to delete multiple rows from a matrix. I know how to delete one by x=x[,-3] # deleting 3. column Is there a quick method how to delete e.g. the 3., 5., 7. and 8. column...

hi, i want to execute the following opimization problem: max r*w s.t.: w*z=1 # sum of w is 1 r, w are [nx1] vectors, z is a [nx1] vector consisting of 1 so far so good, works...

hello, i have run around 65000 regressions and stored them in a list. then i stored the session with save.image on my hard disk. the file is almost 1GB. when i now want to load the image it took...

hi, somehow i can not figure it it, although it sounds simple. i have a matrix and i want one column to be laged (like the lag-operator). e.g. mymatrix[,2]=ifelse(mymatrix[,1]<lag(mymatrix[,1],-1),-1...

hi, i calculate the log-returns in return1 and i want to get the performance for the security. with only one security i have the following code # create matrix to keep performance return100=matrix(rep(100,length(return1)+1)) # matrix...

hi, i want to store an lm-object in mysql and use the following command: dbSendQuery(con,paste("INSERT INTO tablename (id,name,result,result_txt,rsquared) VALUES (",x,",'",z2,"','",serialize(z1,NULL,ascii=F),"','",serialize(z1,NULL,ascii=T...

Hi Arne, i'm sorry - the additional restriction is w' * V * w <= j where j is a [1x1] matrix. i don't know how to incorporate this restriction in the lp-object. would be grateful on any response, thanks, gg...