# フィルター解析

フィルターとフィルター オブジェクトの解析

## 関数

 `filterDesigner` `fvtool` フィルターの可視化ツールを開く
 `block` Generate block from multirate or multistage filter `coeffs` フィルターの係数 `cost` Estimate cost of discrete-time or multirate filter `cumsec` Vector of SOS filters for cumulative sections `denormalize` Undo filter coefficient and gain changes caused by normalize `disp` Filter properties and values `double` Cast fixed-point filter to use double-precision arithmetic `euclidfactors` Euclid factors for multirate filter `fftcoeffs` Frequency-domain coefficients `filtstates.cic` Store CIC filter states `firtype` Type of linear phase FIR filter `freqrespest` Frequency response estimate via filtering `freqrespopts` Options for filter frequency response analysis `freqz` フィルターの周波数応答 `grpdelay` Filter group delay `impz` Filter impulse response `impzlength` Impulse response length `cascade` Cascade of filter system objects
 `isallpass` Determine whether filter is allpass `isfir` Determine whether filter is FIR `islinphase` Determine whether filter has linear phase `ismaxphase` Determine whether filter is maximum phase `isminphase` Determine whether filter is minimum phase `isreal` Determine whether filter uses real coefficients `issos` Determine whether filter is SOS form `isstable` Determine whether filter is stable
 `measure` Measure filter magnitude response `noisepsd` Power spectral density of filter output due to roundoff noise `noisepsdopts` Options for running filter output noise PSD `norm` P-norm of filter `normalize` フィルター分子係数またはフィードフォーワード係数の正規化 `normalizefreq` Switch filter specification between normalized frequency and absolute frequency `nstates` Number of filter states `order` Order of fixed-point filter `phasedelay` Phase delay of filter `phasez` Unwrapped phase response for filter `polyphase` Polyphase decomposition of multirate filter `realizemdl` Simulink subsystem block for filter `reffilter` Reference filter for fixed-point or single-precision filter `reorder` Rearrange sections in SOS filter `reset` Reset filter properties to initial conditions `scalecheck` Check scaling of SOS filter `stepz` Step response for filter `zerophase` Zero-phase response for filter `zplane` Zero-poles plots for filters
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