MATLAB: What is this block

blockidentifysimulink

Hi, does anyone know what this block is?

Best Answer

Sign->Indicate sign of input.
  • The output is 1 when the input is greater than zero.
  • The output is 0 when the input is equal to zero.
  • The output is -1 when the input is less than zero.
http://www.mathworks.com/help/simulink/slref/sign.html
Your block is reversed. You can press the right key on it to see the help.
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