Question

为什么我的matlab里没有svmtrain呢，help svmtrain显示svmtrain 。。no found

Answer 1

可能是你matlab版本太低，如果想用这个函数，上网下一个工具箱，或者安装更高级版本的matlab我的是2010a，可以查到
SVMTRAIN trains a support vector machine classifier

SVMStruct = SVMTRAIN(TRAINING,GROUP) trains a support vector machine
classifier using data TRAINING taken from two groups given by GROUP.
SVMStruct contains information about the trained classifier, including
the support vectors, that is used by SVMCLASSIFY for classification.
GROUP is a column vector of values of the same length as TRAINING that
defines two groups. Each element of GROUP specifies the group the
corresponding row of TRAINING belongs to. GROUP can be a numeric
vector, a string array, or a cell array of strings. SVMTRAIN treats
NaNs or empty strings in GROUP as missing value