matlab讲义10.pptVIP

Saving Workspace Directory Management Formatted Output Low-Level I/O Importing Excel Week 10 Save workspace to matlab.mat.Save to filename.mat.Save only variables var1 var2 .... savesave filenamesave filename var1 var2 ... Load workspace from matlab.mat.Load from filename.mat.Load only variables var1 var2 .... loadload filenameload filename var1 var2 ... Description Function Saving Workspace  Workspace – space of all variables Save workspace – no need to recreate them next time Load workspace – re-load what you have saved and only want to store B for later use. Use: a=rand(20,1); B=toeplitz(a); Suppose you have generated: save lastsession B When we want to use the matrix B again in the future, we can just reload them: load lastsession Workspace Window You can also save the workspace by using “File” then “Save Workspace as..”, or highlighting the variables and right-clicking them. If you can’t find your workspace window or other windows (e.g. current directory window), go to the command window, click “View” and check the window you want. Description Function Show current directory. Current directory is stored in a. pwd a=pwd List the files in directory.List the files in the current directory. dir directorydir Delete the file filename delete filename Make directory the current directory.It results in a string variable a. cd directorya=cd(directory.name) Directory Management Current directory is the one Matlab looks in first to get files. cd Displays the current directory. C:\MATLAB6p5\work cd .. Go up one level. pwd Show current directory ans = C:\MATLAB6p5 cd work Go back down to the subdirectory. pwd ans = C:\MATLAB6p5\work temp.jpg WindTable.m GenData.m . Display all files in current directory dir temp.dat Q2.dat Q1.dat .. Display files with .dat extension. dir *.dat Q1.dat Q2.dat temp.dat Display .dat files starting with Q. dir Q*.dat Q1.dat Q2