Rename _jacobian -> _jac (cf. stan-dev/stanc3#1470).

stan/docs/interface/fft.rst

@@ -9,7 +9,7 @@ Utility Functions
 The following functions, and their two-dimensional analogues, primarily exist as utility functions but may be useful for more complex models.
 
 - :stan:func:`gp_rfft` transforms Gaussian process realizations to the Fourier domain and scales the coefficients such that they are white noise under the Gaussian process prior.
-- :stan:func:`gp_rfft_log_abs_det_jacobian` evaluates the log absolute determinant of the Jacobian associated with the transformations :stan:func:`gp_rfft`.
+- :stan:func:`gp_rfft_log_abs_det_jac` evaluates the log absolute determinant of the Jacobian associated with the transformations :stan:func:`gp_rfft`.
 
 Together, these two functions are used by :stan:func:`gp_rfft_lpdf` to evaluate the likelihood.
 

stan/gptools/stan/gptools/fft1.stan

@@ -75,7 +75,7 @@ Evaluate the log absolute determinant of the Jacobian associated with
 :param n: Size of the real signal. Necessary because the size cannot be inferred from :code:`rfft`.
 :returns: Log absolute determinant of the Jacobian.
 */
-real gp_rfft_log_abs_det_jacobian(vector cov_rfft, int n) {
+real gp_rfft_log_abs_det_jac(vector cov_rfft, int n) {
     vector[n %/% 2 + 1] rfft_scale = gp_evaluate_rfft_scale(cov_rfft, n);
     return - sum(log(rfft_scale[1:n %/% 2 + 1])) -sum(log(rfft_scale[2:(n + 1) %/% 2]))
         - log(2) * ((n - 1) %/% 2) + n * log(n) / 2;
@@ -94,7 +94,7 @@ real gp_rfft_lpdf(vector y, vector loc, vector cov_rfft) {
     int n = size(y);
     int nrfft = n %/% 2 + 1;
     vector[n] z = gp_rfft(y, loc, cov_rfft);
-    return std_normal_lpdf(z) + gp_rfft_log_abs_det_jacobian(cov_rfft, n);
+    return std_normal_lpdf(z) + gp_rfft_log_abs_det_jac(cov_rfft, n);
 }
 
 

stan/gptools/stan/gptools/fft2.stan

@@ -140,7 +140,7 @@ Evaluate the log absolute determinant of the Jacobian associated with
     Fourier transform :code:`cov_rfft2`).
 :returns: Log absolute determinant of the Jacobian.
 */
-real gp_rfft2_log_abs_det_jacobian(matrix cov_rfft2, int width) {
+real gp_rfft2_log_abs_det_jac(matrix cov_rfft2, int width) {
     int height = rows(cov_rfft2);
     int n = width * height;
     int fftwidth = width %/% 2 + 1;
@@ -185,7 +185,7 @@ Evaluate the log probability of a two-dimensional Gaussian process realization i
 */
 real gp_rfft2_lpdf(matrix y, matrix loc, matrix cov_rfft2) {
     return std_normal_lpdf(to_vector(gp_rfft2(y, loc, cov_rfft2)))
-        + gp_rfft2_log_abs_det_jacobian(cov_rfft2, cols(y));
+        + gp_rfft2_log_abs_det_jac(cov_rfft2, cols(y));
 }
 
 

util/gptools/util/fft/__init__.py

@@ -1,15 +1,15 @@
-from .fft1 import evaluate_log_prob_rfft, evaluate_rfft_log_abs_det_jacobian, expand_rfft, \
+from .fft1 import evaluate_log_prob_rfft, evaluate_rfft_log_abs_det_jac, expand_rfft, \
     transform_irfft, transform_rfft
-from .fft2 import evaluate_log_prob_rfft2, evaluate_rfft2_log_abs_det_jacobian, transform_irfft2, \
+from .fft2 import evaluate_log_prob_rfft2, evaluate_rfft2_log_abs_det_jac, transform_irfft2, \
     transform_rfft2
 from .util import log_prob_stdnorm
 
 
 __all__ = [
     "evaluate_log_prob_rfft",
     "evaluate_log_prob_rfft2",
-    "evaluate_rfft_log_abs_det_jacobian",
-    "evaluate_rfft2_log_abs_det_jacobian",
+    "evaluate_rfft_log_abs_det_jac",
+    "evaluate_rfft2_log_abs_det_jac",
     "expand_rfft",
     "log_prob_stdnorm",
     "transform_irfft",

util/gptools/util/fft/fft1.py

@@ -185,12 +185,12 @@ def evaluate_log_prob_rfft(y: ArrayOrTensor, loc: ArrayOrTensor, *,
     rfft_scale = _get_rfft_scale(cov_rfft, cov, rfft_scale, y.shape[-1])
     rfft = transform_rfft(y, loc, rfft_scale=rfft_scale)
     return log_prob_stdnorm(rfft).sum(axis=-1) \
-        + evaluate_rfft_log_abs_det_jacobian(y.shape[-1], rfft_scale=rfft_scale)
+        + evaluate_rfft_log_abs_det_jac(y.shape[-1], rfft_scale=rfft_scale)
 
 
-def evaluate_rfft_log_abs_det_jacobian(size: int, *, cov_rfft: OptionalArrayOrTensor = None,
-                                       cov: OptionalArrayOrTensor = None,
-                                       rfft_scale: OptionalArrayOrTensor = None) -> ArrayOrTensor:
+def evaluate_rfft_log_abs_det_jac(size: int, *, cov_rfft: OptionalArrayOrTensor = None,
+                                  cov: OptionalArrayOrTensor = None,
+                                  rfft_scale: OptionalArrayOrTensor = None) -> ArrayOrTensor:
     """
     Evaluate the log absolute determinant of the Jacobian associated with :func:`transform_rfft`.
 
@@ -202,7 +202,7 @@ def evaluate_rfft_log_abs_det_jacobian(size: int, *, cov_rfft: OptionalArrayOrTe
             :code:`(..., size // 2 + 1)`.
 
     Returns:
-        log_abs_det_jacobian: Log absolute determinant of the Jacobian.
+        log_abs_det_jac: Log absolute determinant of the Jacobian.
     """
     imagidx = (size + 1) // 2
     rfft_scale = _get_rfft_scale(cov_rfft, cov, rfft_scale, size)

util/gptools/util/fft/fft2.py

@@ -178,7 +178,7 @@ def transform_rfft2(y: ArrayOrTensor, loc: ArrayOrTensor, *,
     return unpack_rfft2(dispatch[y].fft.rfft2(y - loc) / rfft2_scale, y.shape)
 
 
-def evaluate_rfft2_log_abs_det_jacobian(width: int, *, cov_rfft2: OptionalArrayOrTensor = None,
+def evaluate_rfft2_log_abs_det_jac(width: int, *, cov_rfft2: OptionalArrayOrTensor = None,
                                         cov: OptionalArrayOrTensor = None,
                                         rfft2_scale: OptionalArrayOrTensor = None) -> ArrayOrTensor:
     """
@@ -194,7 +194,7 @@ def evaluate_rfft2_log_abs_det_jacobian(width: int, *, cov_rfft2: OptionalArrayO
             :code:`(..., height, width // 2 + 1)`.
 
     Returns:
-        log_abs_det_jacobian: Log absolute determinant of the Jacobian.
+        log_abs_det_jac: Log absolute determinant of the Jacobian.
     """
     rfft2_scale = _get_rfft2_scale(cov_rfft2, cov, rfft2_scale, width)
     height = rfft2_scale.shape[-2]
@@ -249,4 +249,4 @@ def evaluate_log_prob_rfft2(y: ArrayOrTensor, loc: ArrayOrTensor, *,
     rfft2_scale = _get_rfft2_scale(cov_rfft2, cov, rfft2_scale, y.shape[-1])
     rfft2 = transform_rfft2(y, loc, rfft2_scale=rfft2_scale)
     return log_prob_stdnorm(rfft2).sum(axis=(-2, -1)) \
-        + evaluate_rfft2_log_abs_det_jacobian(y.shape[-1], rfft2_scale=rfft2_scale)
+        + evaluate_rfft2_log_abs_det_jac(y.shape[-1], rfft2_scale=rfft2_scale)