R语言将dataframe的数据列从字符串类型转换为因子类型(from character vector to factor vector) R语言数据类型查看、数据类型转换 R语言可以使用is.datatype()语法查看数据对象的数据类型;如果是某种类型则返回TRUE、如果不是则返回FALSE; R语言使用as.datatype()语法将数据对象从一种数据类型
vector(data[, 1]) #转换成数字向量 as.numeric(data[, 1]) #连续变量的离散化 score <- data[,3] #切分成3组score1 <- cut(score, breaks = 3) table(score1) #切分成自己设置的组 score2 <- cut(score, breaks = c(90, 100, 110, 120, 130, 140)) table(score2) #一个有序因子 ...
naive-bayesexpectation-maximizationsupport-vector-machineridge-regressionexpectation-maximization-algorithmfactor-analysisdbscanem-algorithmlinear-discriminant-analysisstochastic-gradient-descentlatent-semantic-analysislasso-regressionmultinomial-naive-bayessingular-value-decompositionbatch-gradient-descentsequential-minimal-optim...
Factor scores, also called predictions of the common factors, returned as ann-by-mmatrix.nis the number of rows in the data matrixX, andmis the second input argument offactoran. Note IfXis a covariance matrix (Xtype='covariance'),factorancannot computeF. ...
Understanding the mechanisms underlying differentiation of inflorescence and flower meristems is essential towards enlarging our knowledge of reproductive organ formation and to open new prospects for improving yield traits. Here, we show that SlDOF9 is
Version History Introduced in R2020a See Also Speed Measurement | MTPA Control Reference | Vector Control Reference | PMSM Torque Estimator Topics Open-Loop and Closed-Loop Control Field-Oriented Control (FOC)Why did you choose this rating? Submit How useful was this information? Unrated 1 star...
Cellular reprogramming consists of the loss of differentiated cell identity followed by the acquisition of embryonic stem pluripotency, which can be achieved by the simultaneous expression of the transcription factors OCT4, SOX2, KLF4 and MYC (OSKM; in mice encoded byPou5f1,Sox2,Klf4andMyc, respect...
Tamoxifen resistance is a major problem in the treatment of estrogen receptor (ER) α -positive breast cancer patients. Although the mechanisms behind tamoxifen resistance are still not completely understood, clinical data suggests that increased express
(σ) which controls dislocation glide is termed the resolved shear stress (τ) and is given by τ = σ cos ϕ cos λ, where ϕ et λ are the angles between the tensile axis and the normal of the slip plane, and between the tensile axis and the Burgers vector of the dislocation,...
This diluted bacterial culture (1 μl) was used to PCR amplify cloned inserts in 25 μl reactions with M13rev and M13for (-20) primers flanking the vector cloning site under the following conditions: 95°C for 5 minutes; 30 cycles each at 94°C for 30 seconds, 55°C for 30 seconds...