Sets B-tree split ratios for a dataset transfer property list

Procedure:
 H5P_SET_BTREE_RATIOS ( plist, left, middle, right )

Signature:

 ```
herr_t H5Pset_btree_ratios(hid_t plist,         double left,         double middle,         double right     )
```

 ```
Fortran90 Interface: h5pset_btree_ratios_f      SUBROUTINE h5pset_btree_ratios_f(prp_id, left, middle, right, hdferr)   IMPLICIT NONE   INTEGER(HID_T), INTENT(IN) :: prp_id                                      ! Property list identifier   REAL, INTENT(IN) :: left        ! The B-tree split ratio for left-most nodes   REAL, INTENT(IN) :: middle      ! The B-tree split ratio for all other nodes   REAL, INTENT(IN) :: right       ! The B-tree split ratio for right-most                                   ! nodes and lone nodes.   INTEGER, INTENT(OUT) :: hdferr  ! Error code                                   ! 0 on success and -1 on failure END SUBROUTINE h5pset_btree_ratios_f
```

Parameters:
 hid_t `plist` IN: The dataset transfer property list identifier double `left` IN: The B-tree split ratio for left-most nodes double `right` IN: The B-tree split ratio for right-most nodes and lone nodes double `middle    ` IN: The B-tree split ratio for all other nodes

Description:
 `H5P_SET_BTREE_RATIOS` sets the B-tree split ratios for a dataset transfer property list. The split ratios determine what percent of children go in the first node when a node splits.The ratio `left` is used when the splitting node is the left-most node at its level in the tree; the ratio `right` is used when the splitting node is the right-most node at its level; and the ratio `middle` is used for all other cases.A node which is the only node at its level in the tree uses the ratio `right` when it splits.All ratios are real numbers between 0 and 1, inclusive.

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