search for: rchid

...record of a data frame, find the value in the "HUC" column, then randomly select another observation from the dataframe with the same value in "HUC" column, as well as the same value in "Yr" column as the first observation. I want the function to produce a list of the RchID of the first observation, the RchID of the second randomly chosen observation, and several other characteristics of the randomly chosen observation. Below is the code I have written, but it doesn't work. Thanks for any help. Christy ################test roads=read.csv("streamland23.csv...

Hello, I think this is easy, but I can't seem to find a good way to do this in the R help. I have a list of sites, with multiple years of data for each site id. I want to create a new column that gives a number describing whether it is the 1st year ("1" ) the data was collected for the site, the second year ("2"), etc. I have different years for each siteid, but I don't

...t pedalcolors = c("darkblue","blue","royalblue","darkturquoise","forestgreen","green","yellowgreen","yellow4","yellow","orange","red","darkred","violetred","mediumorchid","purple") #or 2) Making the pedal colors dynamic based on the increments and the max wind speed. incrspeeds = 2 # fills out the increments argument breaks=seq(0,round(maxwind),incrspeeds) # maxwind is the maximum wind speed numcolors=length(breaks) if(numcolors>length(pedalco...