概述
为了避免内存问题,我使用“matrix”包将文档术语矩阵转换为稀疏矩阵,以下是代码:
library(matrix)
documentTermMatrixFrame <- Matrix(documentTermMatrixFrame, sparse = TRUE)
但是,当我尝试将这个矩阵作为“ranger”包的ranger()函数的输入使用以下代码:
library(ranger)
trainSet <- documentTermMatrixFrame[1:750,]
testSet <- documentTermMatrixFrame[751:999,]
fit <- ranger(trainingColumnNames, data=trainSet,write.forest=TRUE)
我遇到了错误:
Error in as.data.frame.default(data) :
cannot coerce class "structure("dgCMatrix", package = "Matrix")" to a data.frame
数据集
这是我正在使用的数据集样本。
<html>
<table style="width:100%">
<tr>
<th>nitemid</th>
<th>sUnSpsc</th>
<th>productDescription</th>
</tr>
<tr>
<td>7460893</td>
<td>26121609Network cable </td>
<td>Category 6A, Advanced MaTriX, 4-pair, 23 AWG, U/UTP copper cable, Plenum (CMP) Rated, White, 1000ft/305m ""</td>
</tr>
<tr>
<td>7460456</td>
<td>26121709Network cable </td>
<td>Shielded marine MUD-resistant armored copper cable, category 7 S/FTP, low smoke zero halogen (LSZH), 4-pair, conductors are 22 AWG construction with foamed PE insulation, twisted in pairs</td>
</tr>
<tr>
<td>7460856</td>
<td>26121890Inter connect cable </td>
<td>1 PC. = 100 M 2 X 1.5 QMM, 100M SPECIAL DESIGN TO UL CLASS 2 YELLOW TPE OIL-RESISTANT AS-INTERFACE SHAPED CABLE</td>
</tr>
</html>
以下是数据集文档术语矩阵的样例。
terms
doc advance category ..... ..... ....... ....... ....... twist
1 1 1 0
2 0 1 1
3 0 0 0
问题
如何将稀疏矩阵作为ranger()函数的输入?
请问有人能帮忙吗?
提前致谢。