MATLAB: How to round number up to a specific number of decimal places

ceildecimalfix?floorMATLABround

Suppose I have a variable x=0.34; is there a function (or how would one look like) to round this number up to, say 0.4 (next highest number with one decimal place)?

Just like ceil, but with decimals?

Best Answer

ceil(10*x)/10

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MATLAB: How to avoid the loss of the last digit (it gives a zero instead of a one)

num2str(uint64(14472334024676221),'%u')

You have exceeded flintmax:

flintmax Largest consecutive integer in floating point format.
  flintmax returns the largest consecutive integer in IEEE double
  precision, which is 2^53. Above this value, double precision format
  does not have integer precision, and not all integers can be represented 
  exactly.

MATLAB: How to round up all components of a matrix to nearest ‘k’ decimal

vpa(d,3)

We can tell from the number of decimal places that you show that you must be using symbolic numbers, so you can use vpa() to evaluate to a specific number of decimal places.

There is no way to round double precision numbers to a particular number of decimal places, because 0.1 is not exactly representable as a finite binary floating point number, for the same reasons that 1/7 is not exactly representable as a finite decimal number.

Best Answer

Related Solutions

MATLAB: How to avoid the loss of the last digit (it gives a zero instead of a one)

MATLAB: How to round up all components of a matrix to nearest ‘k’ decimal

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