iris.data读取文件出错

Posted 2023-03-16

参考技术A tensorflow学习写程序，iris.data数据，大坑，表现和方法如下：

错误

InvalidArgumentError: Expect 5 fields but have 0 in record 0

[[Node: DecodeCSV = DecodeCSV[OUT_TYPE=[DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_FLOAT, DT_STRING], field_delim=",", na_value="", use_quote_delim=true, _device="/job:localhost/replica:0/task:0/device:CPU:0"](ReaderReadV2:1, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_0, DecodeCSV/record_defaults_4)]]

解决方案

Matlab读取UCI数据集Iris中数据

>> [attrib1, attrib2, attrib3, attrib4, class] = textread(‘data\iris.data‘, ‘%f%f%f%f%s‘, ‘delimiter‘, ‘,‘);

>> attrib = [attrib1‘; attrib2‘; attrib3‘; attrib4‘]‘;

>> a = zeros(150, 1);

>> a(strcmp(class, ‘Iris-setosa‘)) = 1;

>> a(strcmp(class, ‘Iris-versicolor‘)) = 2;

>> a(strcmp(class, ‘Iris-virginica‘)) = 3;

至此，属性值均保存到attrib中，类别值保存到数组a中。