How to round the decimal?

Dear All;

I have a number array x = [0.00135678 0.00076243;0.0000045789 0.01234567];

Then i just want to round x to become as: results:[0.0013 0.00076; 0.0000045 0.012];

 What to do?

Thanks in advance.....

Answer 1

[Star Strider]

Try this:

x = [0.00135678 0.00076243;0.0000045789 0.01234567];
L10 = log10(x);                                                 % Base 10 Logarithm
mant = fix(10.^rem(L10,1)*100);                                 % Calculate Mantissa & Remove Extra Digits
expt = floor(L10)-1;                                            % Determine Exponent
Result = mant .* 10.^expt

Result =

     0.001300000000000   0.000760000000000
     0.000004500000000   0.012000000000000

[laith Farhan]

Dear Star Strider Thanks alot for your help. its work 100%

thanks again

[Star Strider]

As always, my pleasure.

Answer 2

[Steven Beumer]

You might want to check out this function for that:

https://nl.mathworks.com/matlabcentral/fileexchange/26212-round-with-significant-digits