From: Multivariate assessment of event-related potentials with the t-CWT method
t-CWT | Input | Processing | Output |
---|---|---|---|
Function | Files | Steps | Files: variables (equations) |
prm2mat | input parameter file | Computes time-to-frequency domain transformation matrix, CWT matrix and log-grid matrix | _A_const.mat : \(\tilde{\mathbf {T}}_{\mathbf {f}}\) (22–29), \(\tilde{\mathbf {T}}_{\mathbf {w}}\) (16–18, 43–45), \((s^g,t^{g,h})\) (40–41) |
t2f | * .t.mat | Performs time-to-frequency domain transformation and filtering of ERP datasets | * .f.mat : \(\tilde{\mathbf {V}}\!_{\mathbf {f}}\) (28) |
_A_const.mat | * .ri0.mat : initial index vector | ||
f2pc | * .f.mat | Computes PCT by performing PCA-based multivariate outlier detection in frequency domain | |
* .ri0.mat | * .ri1.mat : outlier index vector | ||
f2cwss | * .f.mat | Performs CWT and computes sums of squares (SS) for Student’s t-values for t-CWT scalograms | * .cwss.mat : SS of \({\tilde{\mathbf {W}}}\) (48) for the computation of \(\sigma ^k_{{\!\!_\mathcal {A}}{\!_\mathcal {B}}}(s,t)\) and \(\mathtt {t}^k(s,t)\) (19) |
* .pc.mat | |||
* .ri1.mat | |||
_A_const.mat | |||
pc2cnd2ri | * .f.mat | Performs outlier detection for each experimental condition separately with fixed PCT obtained by f2pc | * .ri2.mat : outlier index vector |
* .pc.mat | |||
* .ri1.mat | |||
f2x | * .f.mat | Computes t-CWT scalograms using SS computed by f2cwss, detects t-CWT scalogram extrema, and computes t-CWT matrix | * .tcw.mat : \(\mathtt {t}^k(s,t)\) (19) |
* .pc.mat | * .x.mat : \(\tilde{\mathbf {T}}^\star _{\mathbf {w}}\) (49) | ||
* .cwss.mat | |||
* .ri2.mat | |||
_A_const.mat | |||
x2ld | * .f.mat | Performs PCA-based step-down reduction of t-CWT features obtained by f2x and computes LDF in reduced feature space | * .ld.mat : \({\hat{\mathbf {T}}}^{\mathbf {\star }}_{\mathbf {p}}\) (50–51), \(\mathbf {d_f^\star }\) (52–55) |
* .x.mat | |||
* .ri2.mat |