hiii when i try to use imwrite appear this problem

> x=imread('onion.png');
>> imshow(x)
>> imwrite(x,'onion.bmp')
??? Error using ==> imwrite at 457
Can't open file "onion.bmp" for writing.
You may not have write permission.

please can you help me

Answer 1

[Sean de Wolski]

It means you likely don't have file permissions. There are several things that could cause this:

1. Another program could have it open.
2. The folder doesn't have write permissions and you're not running ML in Admin Mode.

[Walter Roberson]

Also if you are running Windows 7 and your directory is underneath one of the directories that Windows reserves for system use, such as the directory that programs are normally installed in.