similar to: subtract values

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Dear R Help: I am trying to sum data from one column in a dataframe based on a value in another. I do not know how to do this easily in R. For example: Col A Col B 1 0 3 0 2 1 2 0 1 0 4 0 1 1 9 1 3 0 5 0 2 1 I would like to cumsum the values in Col A for all rows where Col B is 0, and a value of 1 in Col B will reset

Dear All, I have several sets of data such as this: year jday avg_m3s 1 1960 1 4.262307 2 1960 2 4.242308 3 1960 3 4.216923 4 1960 4 4.185385 5 1960 5 4.151538 6 1960 6 4.133846 ... There is a value for each day of multiple years. In this particular data set it goes up to 1974. I am am looking to obtain the minimum and maximum values for each year, but also know on which

Dear R Help, I have been struggling with this problem without making much headway. I am attempting to avoid using a loop, and would appreciate any suggestions you may have. I am not well versed in R and apologize in advance if I have missed something obvious. I have a data set with multiple sites along a river where metal concentrations were measured. Three sites are located upstream of a mine

Using the small reproducible example below, I'm wondering how best to complete the following task: In the small reproducible example below, the 3D array prec has indexes that correspond to time, x, y (i.e., prec[time, x, y]). In this case, the time index is hours since some predefined start time. I'd like to add up all the time indexes in 'prec' based on whether or not the

If I want to use fbml elements and rails tags, is there a way to do within a fb:editor? if I do: <% facebook_form_for(:task, at task,:url => create_task_path) do |f| %> Assign Task To: <%= fb_friend_selector %> <%=f.text_field :ttype, :label=> "Title"%> <%=text_field_tag :newrnumdays, ndays, :label => "# Days"%>

Thanks for the reprex. Wouldn't have bothered without it. The following is I believe **almost** what you want. It seems a bit clumsy to me, so others may provide you something neater. But anyway... ## Convert POSIXct vector to dates ## There are 22 different days, not 21 date <- as.Date(prec_idx) ## Sum results by date at each i,j of the last 2 array dimensions z <-

Dear R users, I have run into a problem using if...else and I hope you can shed some light on it. I am using R version 2.2.0.1. I have the following data frame: > head(dat2f) year tot_km3y [1,] 1964 0.1876854 [2,] 1965 0.1835116 [3,] 1966 0.1915012 [4,] 1967 0.1869758 [5,] 1968 0.2249865 [6,] 1969 0.1916011 I need to pick out the median year, and since there are an even number of data,

What does this warning mean precisely? Is there any reason to care about it? Can I Avoid it by another way of programming? Thank you in advance.

Hello I'm a new in R I have a large data.frame "s" (this is actualy just a table in mysql) : > names(s) [1] "symbols", "day", "value" I need to convert it to simple matrix. I have define this matrix like this: > data.matrix <- matrix(nrow=nDays, ncol=nSymbols, dimnames=list(days, symbols)) then i just copy values to the matrix using for()

Hello all, I have not been able to find an answer to this problem. I feel like it might be so simple though that it might not get a response. Suppose I have a dataframe like the one I have copied below (minus the 'calib' column). I wish to create a column like calib where I am subtracting the 'Count' when 'stain' is 'none' from all other 'Count' data for

Hi everyone, I have been trying to compute numbers of days between two dates as follows: > x <- c("1jan1960", "2jan1960", "31mar1960", "30jul1960") > z <- format(x, "%d%b%Y") > ex <- c("1jan1961", "15jan1960", "21mar1975", "10jul1981") > ez <- format(ex, "%d%b%Y") > ez-z

The latest change to ACM makes it fail to compile. This patch fixes the problem. Signed-off-by: Nguyen Anh Quynh <aquynh@gmail.com> $ diffstat acm.patch acm/acm_core.c | 61 --------------------- include/acm/acm_hooks.h | 135 ++++++++++++++++++++++++++++++++++-------------- 2 files changed, 96 insertions(+), 100 deletions(-) _______________________________________________

On a server Centos 7.2 ?I insert my 1Tb usb disk and run sudo mount LABEL=bk-benvet-01 /mnt/bk-benvet-01 the command seem to work but nothing is mounted Into log I see this issue: > apr 01 13:49:06 s-virt.dom.loc kernel: XFS (sdb1): Mounting V4 Filesystem > apr 01 13:49:06 s-virt.dom.loc kernel: XFS (sdb1): Ending clean mount > apr 01 13:49:06 s-virt.dom.loc systemd[1]: Unit

I have a vector of dates. I wish to find the month end date for each. Any suggestions? e.g. For 12/15/05, I want 12/31/05, For 10/15/1995, I want 10/31/1995, etc __________________________________________________ [[alternative HTML version deleted]]

I have 4 sparc based sun boxes I am about to pay money so I can get rid of them. They are running older versions of Solaris. You should be able to load Solaris 10 and play around with * on them. Time to clean the office: 3 Ultra 5 1 Sparcstation 5 I also have a box full of Sun keyboards and mice. Contact me offline if you want them. I've had many good years of development on them and it

Hi, What driver should i use with APC BK-300C ? Michale Plourde Digicom Technologies

Jack Moffitt wrote: > > > 3. I searched the mailing list archive, and got a pointer to > > http://i.cantcode.com/~jack/ where there are some old snapshots > > Funny how you found that, but not this: > > http://i.cantcode.com/~jack/icecast.html was looking for .tar.gz, as the e-mail mentioned snapshots. seems like I was shortsited. > >Wouldn't it be nice if

Carlos A. P. Cunha via samba wrote: > For me, is "magic line" > > find $DEST -depth -mtime +$DAYS -print -delete ---- I'm guessing you probably want 'ctime' there. If you use mtime, then it will be deleted "ndays" after the last modification date on the file -- NOT the time the file was moved into the recycle bin. If you use ctime - that

On Sun, 03 Apr 2016 01:58:42 +0200 Dario Lesca wrote: > Please, someone can help me to resolve this systemd issue? systemctl reset-failed -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com