Simulink®

strace

Set solver trace level

Syntax

strace level

Arguments

Description

The strace command causes the solver to display diagnostic information in the MATLAB Command Window, depending on the value of level. Valid values are 0 (no information) or 1 (maximum detail).

When diagnostic tracing is on, the debugger displays the sizes of major and minor time steps:

[TM = 13.21072088374186 ] Start of Major Time Step
[Tm = 13.21072088374186 ] Start of Minor Time Step

The debugger also displays integration information, including the time step of the integration method, the step size of the integration method, the outcome of the integration step, the normalized error, and the index of the state:

[Tm = 13.21072088374186 ] [H  = 0.2751116230148764 ] Begin Integration Step
[Tf = 13.48583250675674 ] [Hf = 0.2751116230148764 ] Fail  [Er = 1.0404e+000]
	[Ix = 1]
[Tm = 13.21072088374186 ] [H  = 0.2183536061326544 ] Retry
[Ts = 13.42907448987452 ] [Hs = 0.2183536061326539 ] Pass  [Er = 2.8856e-001] 
	[Ix = 1]

When a zero crossing is detected, the debugger displays information about the iterative search algorithm used to identify when the zero crossing occurred. This includes the time step of the zero crossing, the step size of the zero crossing detection algorithm, the length of the time interval bracketing the zero crossing, and a flag denoting the rising or falling direction of the zero crossing:

[Tz = 3.615333333333301 ] Detected 1 Zero Crossing Event 0[F]
                         Begin iterative search to bracket zero crossing event
[Tz = 3.621111157580072 ] [Hz = 0.005777824246771424 ] [Iz = 4.2222e-003] 0[F]
[Tz = 3.621116982080098 ] [Hz = 0.005783648746797265 ] [Iz = 4.2164e-003] 0[F]
[Tz = 3.621116987943544 ] [Hz = 0.005783654610242994 ] [Iz = 4.2163e-003] 0[F]
[Tz = 3.621116987943544 ] [Hz = 0.005783654610242994 ] [Iz = 1.1804e-011] 0[F]
[Tz = 3.621116987949452 ] [Hz = 0.005783654616151157 ] [Iz = 5.8962e-012] 0[F]
[Tz = 3.621116987949452 ] [Hz = 0.005783654616151157 ] [Iz = 5.1514e-014] 0[F]
                         End iterative search to bracket zero crossing event

When solver resets occur, the debugger displays the time at which the solver was reset:

[Tr = 6.246905153573676 ] Process Solver Reset
[Tr = 6.246905153573676 ] Reset Zero Crossing Cache
[Tr = 6.246905153573676 ] Reset Derivative Cache

For more information about the notation displayed by strace, type the following command at the sldebug prompt:

help time

See Also

atrace, etrace, states, trace, zclist

stop

systems