Pole/Zero Editor Panel :: GUI: Filter Design and Analysis Tool (Signal Processing Toolbox)

Signal Processing Toolbox

Pole/Zero Editor Panel

Select the Pole/Zero Editor sidebar button to edit your filter by adding, deleting, or moving its poles and zeros.

Plot Mode Buttons

The plot mode buttons are located to the left of the pole/zero plot. Select one of the buttons to change the mode of the pole/zero plot.

Move pole or zero
Double-click on the pole (x) or zero (o) and drag it to the desired location. If the pole/zero has a corresponding conjugate, that conjugate is also selected and the Conjugate checkbox is selected.
To move the conjugate pair, drag the pole/zero to the desired location; the conjugate moves to the appropriate location.
To move only one pole/zero from a conjugate pair, deselect the Conjugate checkbox and move the pole/zero.

Add pole
Click at the desired location. A new pole (x) is added. To add its conjugate, select Conjugate.

Add zero
Click at the desired location. A new zero (o) is added. To add its conjugate, select Conjugate.

Delete pole or zero
To delete a pole or zero, click on the desired pole (x) or zero (o). If the selected pole/zero has a conjugate, the conjugate is also deleted.

	Move pole or zero	Double-click on the pole (`x`) or zero (`o`) and drag it to the desired location. If the pole/zero has a corresponding conjugate, that conjugate is also selected and the Conjugate checkbox is selected. To move the conjugate pair, drag the pole/zero to the desired location; the conjugate moves to the appropriate location. To move only one pole/zero from a conjugate pair, deselect the Conjugate checkbox and move the pole/zero.
	Add pole	Click at the desired location. A new pole (`x`) is added. To add its conjugate, select Conjugate.
	Add zero	Click at the desired location. A new zero (`o`) is added. To add its conjugate, select Conjugate.
	Delete pole or zero	To delete a pole or zero, click on the desired pole (`x`) or zero (`o`). If the selected pole/zero has a conjugate, the conjugate is also deleted.

Plot Parameters

The following plot paramters and controls are located to the left of the pole/zero plot and below the plot mode buttons.

Filter Gain--factor to compensate for the filter's pole(s) and zero(s) gains
Coordinates--units (Polar or Rectangular) of the selected pole or zero
Magnitude--magnitude of the selected pole or zero in polar coordinates
Angle--angle of selected pole or zero(s) in polar coordinates
Real--real component of selected pole(s) or zero(s) in rectangular coordinates
Imaginary--imaginary component of selected pole or zero in rectangular coordinates
Section--for multi-section filters, number of the current section
Conjugate--creates a corresponding conjugate pole or zero, or automatically selects the conjugate pole or zero if it already exists
Auto Update--immediately updates the displayed magnitude response when poles or zeros are added, moved, or deleted

Edit Menu Options

Pole-zero Editor on the Edit menu has menu items for selecting multiple poles/zeros, for inverting and mirroring poles/zeros, and for deleting, scaling and rotating poles/zeros.

Import Filter Panel Other Sidebar Buttons