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If Expression or Logical expression is selected, enter an Expression in the text field. For example, an expression can be abs(x-y) to plot a fraction of elements closest to the line y = x (that is, the fraction that you specify is the fraction where the expression evaluates to the smallest values). An example of a logical expression is (h>0.1)&&(h<0.4), which shows the elements with an element size between 0.1 and 0.4 (h is the predefined variable for the mesh element size). Another example is x>0, which plots elements in the right half-plane only. The expression can include unit syntax such as y<50[cm]. Click the Replace Expression () button to select a predefined quantity and replace the entire contents of the Expression field with the corresponding variable as the only expression.
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If Random, Expression, Worst quality, Best quality, or Size is selected, specify the Fraction of elements (0–1) to show (the default is 1, which means that all elements are included).
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