@@ -536,11 +536,13 @@ def disk_margins(L, omega, skew = 0.0, returnall = False):
536536
537537 Parameters
538538 ----------
539- L : SISO or MIMO LTI system representing the loop transfer function
539+ L : SISO or MIMO LTI system
540+ Loop transfer function, e.g. P*C or C*P
540541 omega : ndarray
541542 1d array of (non-negative) frequencies (rad/s) at which to evaluate
542543 the disk-based stability margins
543- skew : (optional, default = 0) skew parameter for disk margin calculation.
544+ skew : float, optional, default = 0
545+ skew parameter for disk margin calculation.
544546 skew = 0 uses the "balanced" sensitivity function 0.5*(S - T)
545547 skew = 1 uses the sensitivity function S
546548 skew = -1 uses the complementary sensitivity function T
@@ -711,9 +713,11 @@ def disk_margin_plot(alpha_max, skew = 0.0, ax = None):
711713
712714 Parameters
713715 ----------
714- alpha_max : worst-case disk margin(s) across all (relevant) frequencies.
716+ alpha_max : float
717+ worst-case disk margin(s) across all (relevant) frequencies.
715718 Note that skew may be a scalar or list.
716- skew : (optional, default = 0) skew parameter(s) for disk margin calculation.
719+ skew : float, optional, default = 0
720+ skew parameter(s) for disk margin calculation.
717721 skew = 0 uses the "balanced" sensitivity function 0.5*(S - T)
718722 skew = 1 uses the sensitivity function S
719723 skew = -1 uses the complementary sensitivity function T
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