metalab导入不同的文件

先说一下字符串，字符串在matlab中需要加单引号，你直接使用newData1 = importdata(DOW.txt); matlab便会将DOW.txt看成是变量，但是importdata需要一个包含文件名的字符串变量，但是DOW.txt不知道是什么东西，所以会出现??? Undefined variable "DOW" or class "DOW.txt". 正确的使用方法是：newData1 = importdata('DOW.txt'); 或者path='DOW.txt'newData1 = importdata(path); 不过importdata不支持后缀名为txt文件，其支持的文件后缀有： Data formats Command Returns MAT - MATLAB workspace load Variables in file. CSV - Comma separated numbers csvread Double array. DAT - Formatted text importdata Double array. DLM - Delimited text dlmread Double array. TAB - Tab separated text dlmread Double array. Spreadsheet formats XLS - Excel worksheet xlsread Double array and cell array. WK1 - Lotus 123 worksheet wk1read Double array and cell array. Scientific data formats CDF - Common Data Format cdfread Cell array of CDF records FITS - Flexible Image Transport System fitsread Primary or extension table data HDF - Hierarchical Data Format hdfread HDF or HDF-EOS data set Movie formats AVI - Movie aviread MATLAB movie. Image formats TIFF - TIFF image imread Truecolor, grayscale or indexed image(s). PNG - PNG image imread Truecolor, grayscale or indexed image. HDF - HDF image imread Truecolor or indexed image(s). BMP - BMP image imread Truecolor or indexed image. JPEG - JPEG image imread Truecolor or grayscale image. GIF - GIF image imread Indexed image. PCX - PCX image imread Indexed image. XWD - XWD image imread Indexed image. CUR - Cursor image imread Indexed image. ICO - Icon image imread Indexed image. RAS - Sun raster image imread Truecolor or indexed. PBM - PBM image imread Grayscale image. PGM - PGM image imread Grayscale image. PPM - PPM image imread Truecolor image. Audio formats AU - NeXT/Sun sound auread Sound data and sample rate. SND - NeXT/Sun sound auread Sound data and sample rate. WAV - Microsoft Wave sound wavread Sound data and sample rate.