A number in matlab by default uses how much memory?

In summary, the default memory usage for a number in MATLAB is 8 bytes, according to the "whos" command. However, this was not one of the options given in a multiple choice question and the correct answer may vary depending on the length and presence of decimals in the number.
  • #1
gpax42
25
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A number in MATLAB by default uses how much memory?

my professor asked me this question today and I wasnt sure.

In MATLAB I assigned a random number to the variable x

>> x = 5.5623

and then used the "whos" command to determine how many bytes were stored. According to "whos", the number required 8 bytes of memory.

However, 8 wasnt part of the multiple choice.

the multiple choice were...

a. 64 bits
b. Depends on its length
c. 8 bits if it has no decimal, 32 bits if it has a decimal
d. 4 megabytes

could any1 shine some light on this problem for me, any advice would be much appreciated :smile:
 
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  • #2
A byte is 8 bits...
 

1. How much memory does a number in Matlab by default use?

A number in Matlab by default uses 8 bytes of memory, regardless of its value or type.

2. Does the size of the number affect the amount of memory it uses in Matlab?

No, the size of the number does not affect the amount of memory it uses in Matlab. As mentioned, by default it uses 8 bytes of memory.

3. Can I change the default memory usage for numbers in Matlab?

No, the default memory usage for numbers in Matlab cannot be changed. However, you can use data types with smaller memory sizes if memory usage is a concern.

4. Does the number of decimal places affect the memory usage in Matlab?

Yes, the number of decimal places does affect the memory usage in Matlab. For example, a floating-point number with more decimal places will use more memory compared to one with fewer decimal places.

5. Is there a limit to the size of numbers that can be stored in Matlab?

Yes, there is a limit to the size of numbers that can be stored in Matlab. The maximum value that can be stored is approximately 1.8e+308, while the minimum value is approximately -1.8e+308.

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