Notice that the f2 factor has an index of 2 1 2 3, which is generally returned using the as.number call as shown in the next code sample: > f2 <- factor(c(3, 2, 3, 4)) > f2 [1] 3 2 3 4 Levels: 2 3 4 > f2.n <- as.numeric(f2) > unclass(f2) [1] 2 1 2 3 ...
as.factor():将参数强制转换为factor类型 例如上图中我们就可以改写成 x = as.factor(x) 值得注意的是,as.factor()的参数仅为 x ,levels,exclude,ordered,nmax是factor而非as.factor的参数。因此,传递不使用的参数会给运行带来错误。 此外与factor()有关的函数有: is.factor():判断数据是否为factor模式,并...
data3 <- as.data.frame(unclass(data3), # Convert all columns to factor stringsAsFactors = TRUE)If we apply the str function again, we can see the change:str(data3) # Check class of all columns # 'data.frame': 5 obs. of 4 variables: # $ x1: int 1 2 3 4 5 # $ x2: ...
This example, which uses sample Census Data shipped with RevoScaleR, simply uses F() to treat the 'age' variable as a factor in the summary formula: sampleDataDir <- rxGetOption("sampleDataDir") censusWorkers <- file.path(sampleDat...
Onepound, the international avoirdupois pound, is legally defined as exactly 0.45359237 kilograms. Kilogram to lbs formula To calculate a kilogram value to the corresponding value in pound, just multiply the quantity in kilogram by2.20462262184878(the conversion factor). ...
•New formulation for shape factor to consider matrix subdivision is derived and validated through numerical examples.•A general Multi-Porosity Model ... B Yan,M Alfi,C An,... - 《Journal of Natural Gas Science & Engineering》 被引量: 15发表: 2016年 Final report of the TRUE Block Sca...
Multiple superoxide dismutase 1/splicing factor serine alanine 15 variants are associated with the development and progression of diabetic nephropathy: the... Despite familial clustering of nephropathy and retinopathy severity in type 1 diabetes, few gene variants have been consistently associated with thes...
My wife has a scenario where she's pulling in a number of columns that end up with a class of "pq_stuff_enum". She doesn't really care that its an enum, and would really like it to come through as a character or possibly a factor. It see...
TGF-β induction of transcriptional factor Runx1 is crucial for the conversion, since silencing Runx1 by siRNA inhibited Th1 conversion into Th17 cells. Furthermore, TGF-β enhanced histone H3K9 acetylation but inhibited H3K9 trimethylation of Runx1- and ROR-γt-binding sites on il-17 or rorc ...
Factor value Offset value Number—Decimal to percent 100 Leave as 0 Temperature—Degrees Celsius to degrees Fahrenheit 1.8 32 Weight—Pounds to kilograms 0.45359237 Leave as 0 You can't enter fractions in theFactorsetting (for example, 5/9). You can only enter positive and negative decimals an...