.IDEAS.Utilities.Math.Functions.round

Information

Function that outputs the input after rounding it to n digits.

For example,

• set n = 0 to round to the nearest integer,
• set n = 1 to round to the next decimal point, and
• set n = -1 to round to the next multiple of ten.

Hence, the function outputs

    y = floor(x*(10^n) + 0.5)/(10^n)  for  x > 0,
    y = ceil( x*(10^n) - 0.5)/(10^n)  for  x < 0.

To use this function as a block, use IDEAS.Controls.OBC.CDL.Reals.Round.

Interface

function round
  extends Modelica.Icons.Function;
  input Real x "Argument to be rounded";
  input Integer n "Number of digits being round to";
  output Real y "Connector of Real output signal";
end round;

Revisions

• August 30, 2024, by Michael Wetter:
  Removed wrong parameter declaration on a protected variable which causes an error in Dymola 2025x beta1.
  This is for Buildings, #3978.
• March 2, 2020, by Michael Wetter:
  First implementation.
  This is for Buildings, #2170.