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How can i change the default size of a variable

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Venkatapathi
Venkatapathi 2012-2-13
Hi all
when i enter a variable in command window... it is showing the size of a variable is 8 bytes....
is thereany ways to change the size of the variable???
Thanks

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回答（3 个）

Image Analyst
Image Analyst 2012-2-13
What size do you want? You can cast it if you want, for example
intK8 = uint8(doubleK);
intK16 = uint16(doubleK);
singleK = single(doubleK);
Walter Roberson
Walter Roberson 2012-2-13
The only way to change the default size of variables is to go back to MATLAB 2.x before MATLAB supported double precision.
Jan
Jan 2012-2-13
The "size" of a variable, which is defined as a scalar is "[1 x 1]", this means "one scalar value". The "8 bytes" is the memory required to store a double value. Defining a int64 occupies 8 bytes also, while a single needs 4 bytes. A double can store a value more accurately than a single, an in consequence it requires mire bytes to be stored.
Why do you want to change the "precision" (not "size") of a variable?

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