search for: lithology

hello, I am very new to R. My current data set is a mix of values and categories. It is a geoscience data set, with values per rock sample. Case in point, each sample belongs to a lithology class, and each sample has several physical property measurements (density, porosity...). I want to be able to plot these physical properties for all samples in each lithology class. this is how i'm doing it now: > tc = read.table(....) > attach(tc) > names(tc) tc = [1] "Well&qu...

...hat on actuall R code. Those of you which are geologist or work with boreholes woudl understand that i would like to achieve. I'll tr to explain as good as I can...so here it goes.. I have around 1000 geomechanical (geological) borehole logs in a database. The logs contain staial info, lithology and some laboratory data. My initial goal is compare the boreholes that are closer together (ie.e closer that 50 meters) to see if they are similiar lithologicaly. I thought maybe this can be done with some kind of multiple regression analysis where one would test if layers (ie. Clayey layer in...

Hello all   I have a geology map that has three level, bellow   <-geology lithology    landscape   landform     landform level is used as covariate (with codes=1,2,3,4,5) for training of neural network, but this level has missing data as NA. I want to replace the missing data of landform level with 0 (zero). Finally, landform will have codes  0,1,2,3,4,5.   please help me   Thank...

...el. I have previously done something similar with nonlinear least squares models (nls) and it worked very well, however gnm doesn't seem to like these dummy variables, and doesn't estimate the parameters. It works if I put the dummy variables into a linear model using gnm, like so: (where LithologyB is a series of ones and zeros, representing the occurrence of Lithology B, etc.) > summary(gnm(response~LithologyB+LithologyC+LithologyD+LithologyE+LithologyF, family=binomial)) Linear predictor - using glm.fit Call: gnm(formula = response ~ LithologyB + LithologyC + LithologyD + Litholog...