search for: calicul

Hi all, I am trying to create a "index.csv" with caliculating different types of caliculations . In that i have to caliculate on 10,000 studies and have to insert many no of rows more than 500,000 for that right now I am inserting every row after caliculating and doing data.frame but its taking much time to create that index.csv is there any thing like...

Hi all, I got one intresting problem with caliculating mean that is while i am taking mean of values *0.6, -0.8, 4, -3.8* using *val<-c(0.6, -0.8, 4, -3.8)* *mean(val)* it given result as *2.775558e-17* but the actual result is *"0"* can any one suggest how can I get correct mean result in this case can any one suggest how I ca...

Hi all, I read data from *.xls file and i did some caliculations on that data and now i have to create a column in the same .xls file and i have to insert the data in to the consicutive rows related to the previous data i tried it with *write.xls() *but the thing is it deleted all the columns previously presented in that file and it created a column and in...

Hi all, I am trying to parse a vector for caliculating minimum in that vector the vector having values like 1 Kontrolle 2 Placebo 3 125mg/kg 4 250mg/kg 5 500mg/kg 6 1000mg/kg hear i tries for comverting it into numeric with using "as.numaric()" function but i got values like 5 6 2 3 4 1...

Hi all, I have a problem with checking File is present in the directory or not like I have a sequence of files in one folder I have to take each file in order and have to caliculate on those files data but in order some files are missing for that I have to check and load those files for that I am using condition like if(file.exists(findings)==TRUE){} its giving results for files which are present in that folder but for files which are not present in that folder its giv...

...problem with appending data into the *.csv file like abc<-read.csv("bbb.csv") # reading data from one csv file abc1<-mean(subset(abc,Group=="A")) hear i have to creat a .csv file and in that i have to create column's with names *group, mean* and farther i have to caliculate for Groups:-A, B, C, D, F and i have to append data to consicutive rows of groups can any one suggest how can i farward in this issue thanks in advance [[alternative HTML version deleted]]

Hi all, I am strugling with date formates and caliculating diferent operations like different between 2 dates and getting minimum in vector of dates that is i m working with dates in formate "6/22/1992 12:00:00 AM" and the vector is [1] 6/4/1992 12:00:00 AM 2/13/1992 12:00:00 AM 6/19/1992 12:00:00 AM [4] 2/11/1992 12:00:00...

...em with * "toString()"* function its behaving odd in some times most of the times its giving correct results but in peculier cases its giving results like *"愭]"* especially while i am working with c# +R-project thats also after getting some error like after trying to caliculate "*mean("NA")" * can any one help me why its giving like those results and this error is not consistent some times this error is comming and some times this error is not comming please help me to get understand why its behaving like that thanks in advance kiran ** [[al...