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Need help with importing database with text field in Regressiontree

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mohamed mizan
mohamed mizan 2014 年 8 月 20 日
終了済み: MATLAB Answer Bot 2021 年 8 月 20 日
i have database car and i have field michenicname and location how can i use carname ?
I have tried X=[michenicname location Horsepower Weight]
load carsmall % contains Horsepower, Weight, MPG X = [Horsepower Weight]; rtree = fitrtree(X,MPG)

回答 (1 件)

Tom Lane
Tom Lane 2014 年 8 月 23 日
You don't say what your data looks like and what problem you are having.
I'm guessing the michenicname variable is text and that's why you're having a problem. You can't concatenate that with numeric variables. Your best bet may be to code the unique string values as group numbers. The grp2idx function may be helpful.

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