Re: [R] Help with sub-setting

oops, that should have been: by(data$Z,data[,c("X","Y")],summary) Jim On Tue, May 26, 2020 at 9:00 AM Jim Lemon wrote: > > Hi Jamie, > Your seem to want some descriptive statistic applied to subsets of > your data frame "data" (maybe a more imaginative name would help). > I'll guess that your d

Re: [R] Help with sub-setting

Hi Jamie, Your seem to want some descriptive statistic applied to subsets of your data frame "data" (maybe a more imaginative name would help). I'll guess that your data frame contains variables X, Y and Z among others. Further, I'll guess that you want the summaries of variable Z subset by Y and X

Re: [R] Help with sub-setting

Hello, Inline. Às 13:26 de 25/05/20, Burgess, Jamie escreveu: Dear all, I hope this message finds you well. I am currently trying to subset my data by two variables, so far, I have tried two different ways to stratify participants into groups. I don't understand what you mean by this, do yo

[R] Help with sub-setting

Dear all, I hope this message finds you well. I am currently trying to subset my data by two variables, so far, I have tried two different ways to stratify participants into groups. I would like to use the �summary� and �table� arguments to characterise the data of participants based on the pre

Re: [R] Help with sub-setting data.frame

Your subset problem has been solved already but i'd like to add a comment on this: > I want all rows where TTE is equal to 0.024657534 Comparing floating point numbers for equality with '==' is problematic so a simple df[df$TTE == 0.024657534, ] can easily fail. have a look at help("=="), especi

Re: [R] Help with sub-setting data.frame

Thanks. I have no idea how I did not try that. Sigh! all good now! Worik On Wed, Sep 2, 2009 at 7:04 PM, Stefan Grosse wrote: > On Wed, 2 Sep 2009 17:12:18 +1200 Worik R wrote: > > WR> I have a data frame, df that I want to extract some rows from > > What you need is subset, see > ?subset >

Re: [R] Help with sub-setting data.frame

On Wed, 2 Sep 2009 17:12:18 +1200 Worik R wrote: WR> I have a data frame, df that I want to extract some rows from What you need is subset, see ?subset Example: df<-data.frame(TTE=(0:10)/100,SOME=rnorm(11)) df # subset with all columns subset(df,TTE<0.02) # the same as: df[df$TTE<0.02,] When y

[R] Help with sub-setting data.frame

Friends I have a data frame, df that I want to extract some rows from Here is a sample of the data > head(df) TDate Expiry Underlie Strike CSettle PSettle Futures ExDate TTE 1 20080102 200801 200803 0.840 0. 0 0.9207 20080104 0.005479452 2 20080102 200801 200803 0.850 0