I got an error: Error using classreg.learning.FullClassificationRegressionModel.prepareDataCR (line 192) X must be a numeric matrix. Error in example2 (line 44) classifier = fitcecoc(featuresTrain,YTrain); why do I get this error and how should I ...
根据我的观察，你从csv中读入的latam.frm中，TotalPop列是字符串类型，你看，比如第一个，40,765，中间还有逗号呢，这应该是一个字符窜，你得先把字符串转换成整数才行。
Seese,D. Visualization and clustering of business process collections based on process metric values, in: International Symposium on Symbolic and Numeric ... J Melcher,D Seese - International Symposium on Symbolic & Numeric Algorithms for Scientific Computing 被引量: 41发表: 0年 ...
这个错误是在使用read.table()函数读取文件遇到的,经过摸索,发现read.table()读取的数据类型为data.frame, 通过将y的类型由data.frame转换为vector可解决报错。 ###将data.frame数据类型转换为vector数据类型 y<-as.vector(as.matrix(y)) 以后遇到数据类型类的报错问题,可借助下面思路尝试解决: 1.使用class()...
Summary: Molecular imaging is widely recognized as the main stream in the next generation of biomedical imaging. Bioluminescence tomography (BLT) is a rapi... W Han,W Cong,W Ge - 《Inverse Problems》 被引量: 127发表: 2006年 Linking Market Orientation and Environmental Performance: The Influence...
然后想用同样的数据再用ggplot2画张图。用p <- ggplot(data=filename, mapping = aes(x=V1))时总显示⚠️Error:’data’ must be a data frame, or other object coercible by ‘fortify()’, not a numeric vector. 补充信息:用head(filename)出来的是一个有两列的matrix赞...
Error using surf (line 71) Z must be a matrix,... Learn more about error, z must be a matrix, not a scalar or vector., matlab
针对您提出的问题“argument x must be a data frame or list of data frames”,这里我将按照您给出的提示,分点进行回答,并包含必要的代码片段来佐证。 1. 确认x的当前数据类型 在R语言中,您可以使用class()函数来检查x的当前数据类型。例如: R class(x) 这将返回x的数据类型,如"numeric", "character"...
今天用pRRophetic R包时发现不能用了,出现Error in if (class(testExprData) != "matrix") stop("ERROR: \"testExprData\" must be a matrix.") : the condition has length > 1的报错。经检查发现在较新的R版本(=4.3.0)下class(matrix)会返回"matrix"和"array"两个属性,而在老版本的R(=3.6.1...
Create a matrix and test whether it is a column vector. Because the matrix has a nonzero second dimension size,mustBeColumnthrows an error. u = ones(4,5); mustBeColumn(u) Value must be a column vector. Validate That Function Input Is Numeric Column Vector ...