Klaus Weinbauer

Hi, I ran into a problem when executing the following example from the documentation: ```python from ace.samples import wang04 wang04.run_wang04() ``` The problem was the calculation for the figure position....

RandomWalk kernel incompatible with SciPy version >=1.14.0

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**Describe the bug** The arguments for the function `scipy.sparse.linalg.cg` changed. `tol` was deprecated and got replaced by `rtol` in version 1.14.0 [[1](https://docs.scipy.org/doc/scipy-1.13.1/reference/generated/scipy.sparse.linalg.cg.html)] **To Reproduce** ``` from grakel.graph import Graph from...

make RandomWalk kernel compatible with SciPy version >= 1.12.0

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This PR fixes #111. Deprecated argument `tol` in function `scipy.sparse.linalg.cg` was removed in version 1.14.0 [[1](https://docs.scipy.org/doc/scipy-1.13.1/reference/generated/scipy.sparse.linalg.cg.html)]. Minimal compatible version of SciPy is now 1.12.0.

explicitly define dtype for sparse matrix

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Fix issue #113 by setting the datatype to float during sparse matrix initialization.

**Describe the bug** When the features in the VertexHistogram kernel are initialized by a sparse matrix the matrix elements are of type `int64`. This causes a type casting error when...