matlab笔记

有些地方总是和python搞混 特此记下来

matlab a:b 生成array左右都是闭区间
array access用(), 且从1开始, 不是0

• array dimension

size(array)%第一维的长度size(array,1)

• cat

C = cat(dim, A, B)C = cat(dim, A1, A2, A3, A4, ...)

• for

x = ones(1,10);# n = [2,6]for n = 2:6    x(n) = 2 * x(n - 1);end

• print

fprintf('We all know %d+%d=%d!\n',1,1,2);

• permute

im = permute(im, [2,1,3]); 

• write float array to file

% 按照 row, column, channel 存储parr=permute(OUT_ARRAY,[3,2,1]);%sn=prod(size(parr));%rpa=reshape(parr,[1,prod(size(parr))]);fname='/path/to/out/out.bin';fileID = fopen(fname,'w');fwrite(fileID,parr,'float');fclose(fileID);

• read float array

fname='/path/to/out/out.bin';fileID = fopen(fname,'r');SN=rows*cols*cn;data=fread(fileID,[1,SN],'float');fclose(fileID);%rdata=reshape(data,[rows,cols,cn]);rdata=reshape(data,[cn,cols,rows]);feat_2=permute(rdata2,[3,2,1]);

• pause

pausepause(n)pause on pause off

pause by itself, causes M-files to stop and wait for you to press any key before continuing.
pause(n) pauses execution for n seconds before continuing.
pause on allows subsequent pause commands to pause execution.
pause off ensures that any subsequent pause or pause(n) statements do not pause execution. This allows normally interactive scripts to run unattended.