Fit poisson mash to data
pois_mash(
data,
Ulist,
ulist,
ulist.epsilon2 = rep(1e-08, length(ulist)),
normalizeU = TRUE,
gridmult = 2,
wlist,
ruv = FALSE,
Fuv,
rho,
update.rho = TRUE,
update.mu = TRUE,
verbose = FALSE,
C = diag(ncol(data$X)) - 1/ncol(data$X),
res.colnames = paste0(colnames(data$X), "-mean"),
posterior_samples = 0,
median_deviations = FALSE,
seed = 1,
init = list(),
control = list()
)
pois_mash_control_default()
“pois.mash” data object, typically created by
calling pois_mash_set_data
.
List of H full-rank covariance matrices, such as the
list of covariance matrices Ulist
returned by
pois_cov_ed
).
List of G numeric vectors each of which forms a
rank-1 covariance matrix, such as the list of vectors ulist
returned by pois_cov_ed
.
Numeric vector of length G used to add a small positive value to the diagonals of each rank-1 prior covariance matrix to avoid tight error bars.
Logical scalar indicating whether to normalize the prior covariances to have a maximum of 1 on diagonal.
Numeric scalar indicating factor by which adjacent grid values should differ; use a number close to 1 for fine grid.
Numeric vector of length L giving the scaling factors for the prior covariance matrices
Logical scalar indicating whether to account for
unwanted variation. When ruv = TRUE
, Fuv
must be
provided.
J x D matrix of latent factors causing unwanted variation, with features as rows and latent factors as columns.
D x R matrix of effects corresponding to unwanted
variation, such that bias = Fuv %*% rho
.
A logical scalar indicating whether to update
effects corresponding to unwanted variation. Ignored if ruv =
FALSE
.
A logical scalar indicating whether to update
gene-specific means mu. If update.mu = FALSE
, initial mu
must be provided in init
.
A logical scalar indicating whether to print ELBO at each iteration.
Q x R matrix of contrasts for effects. The default contrasts matrix is an matrix of condition-wise differences relative to the mean across all conditions.
Character vector of length Q giving the names of the contrasts.
The number of samples to be drawn from the posterior distribution of each effect.
Logical scalar indicating whether to calculate posterior summary of deviation of condition-specific effects relative to the median over all conditions.
a random number seed to use when sampling from the posteriors.
It is used when posterior_samples > 0
or median_deviations = TRUE
.
List of initial values for model parameters, such as an
output from pois_mash_ruv_prefit
).
List of control parameters with the following
elements: “maxiter”, maximum number of outer loop
iterations; “maxiter.q”, maximum number of inner loop
iterations for updating the variational parameters at each outer
loop iteration; “maxpsi2”, maximum value for the
gene-specific dispersion parameter psi2.; “maxbias”, maximum
value for the gene-specific range of bias caused by unwanted
variation; “tol.mu”, threshold for mu (gene-specific,
subgroup-specific means on the log scale) to skip update;
“tol.psi2”, relative threshold for psi2 (gene-specific
dispersion parameter) to skip update; “tol.bias”, threshold
for bias caused by unwanted variation to skip update;
“tol.q”, relative tolerance for assessing convergence of
variational parameters at each iteration; “tol.rho”,
tolerance for assessing convergence of effects corresponding to
unwanted variation; nc
, the maximum number of threads used
in the multithreaded updates. Any named components will override
the default optimization algorithm settings (as they are defined by
pois_mash_control_default
).
List with the following elements:
List containing the posterior summaries of the J x Q matrix of effects.
List containing the parameter estimates of the poisson mash model.