search for: tave

Displaying 4 results from an estimated 4 matches for "tave".

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2011 Mar 14
3
increase a value by each group?
...3 3852 site_B 147 3852.03 3852 site_B 147 3852.03 3852 site_B 147 3852.03 54962 site_C 27 54962.01 54962 site_C 27 54962.01 54962 Site_D 217 54962.02 54962 Site_D 217 54962.02 54962 Site_D 217 54962.02 54962 Site_D 217 54962.02 Currently I found the way to increase the depth but not like I need, tave = my_data$Depth + (ave(my_data$Depth, my_data$index, FUN=seq_along))/100 Depth s_name index test 3852 Site_1 144 3852.01 3852 Site_1 144 3852.02 3852 Site_1 144 3852.03 3852 site_A 145 3852.01 3852 site_A 145 3852.02 3852 site_A 145 3852.03 3852 site_A 145 3852.04 3852 site_B 147 3852.01 3852 site...
2007 Oct 10
1
error message with option checkBuild in update.packages in R 2.6.0
Hi System: Linux Open SuSE 10.2 I upgraded to R 2.6.0 and wanted to upgrade my packages as well. I tried to use the checkBuild=TRUE option in update.packages, it asked me if I wanted to update the package and I answered with yes, and finally ig tave me the error message unknown parameter "checkBuild" in function install.packages. My question: is the option still necessary or is the checkBuild done automatically? IF yes, I just update.packages without the option and don't woryy. Rainer
2013 May 01
0
Thornthwaite Method in R
Hi,Has anybody worked with thornthwaite method to calculate the daily evapotranspiration ? I have used the following code to calculate monthly evaporation but what I need is daily evapotranspiration. Epot <- thornthwaite(Tave, lat, na.rm = FALSE) # Evaluates evapotranspiration for each month. Do you have any code which works for daily timestep ? Its more technical question, may be some hydrologist has gone across it already. Thanks in advance !Anup KhanalNTNU ..................Anup KhanalNorwegian Institute of scienc...
2011 Aug 03
4
slow computation of functions over large datasets
Hello there, I’m computing the total value of an order from the price of the order items using a “for” loop and the “ifelse” function. I do this on a large dataframe (close to 1m lines). The computation of this function is painfully slow: in 1min only about 90 rows are calculated. The computation time taken for a given number of rows increases with the size of the dataset, see the example with