[BUGFIX] Circular upsampling across wind directions

examples/003_wind_data_objects.py

@@ -224,7 +224,7 @@
 # bins for which frequency is zero are not simulated.  This can be changed by setting the
 # compute_zero_freq_occurrence parameter to True.
 wind_directions = np.array([200.0, 300.0])
-wind_speeds = np.array([5.0, 1.00])
+wind_speeds = np.array([5.0, 10.0])
 freq_table = np.array([[0.5, 0], [0.5, 0]])
 wind_rose = WindRose(
     wind_directions=wind_directions, wind_speeds=wind_speeds, ti_table=0.06, freq_table=freq_table

examples/examples_layout_optimization/002_optimize_layout_with_heterogeneity.py

@@ -26,10 +26,10 @@
 
 # Setup 2 wind directions (due east and due west)
 # and 1 wind speed with uniform probability
-wind_directions = np.array([270.0, 90.0])
+wind_directions = np.array([90.0, 270.0])
 n_wds = len(wind_directions)
-wind_speeds = [8.0] * np.ones_like(wind_directions)
-turbulence_intensities = 0.06 * np.ones_like(wind_directions)
+wind_speeds = np.array([8.0])
+
 # Shape frequency distribution to match number of wind directions and wind speeds
 freq_table = np.ones((len(wind_directions), len(wind_speeds)))
 freq_table = freq_table / freq_table.sum()
@@ -106,7 +106,7 @@
 fig = plt.gcf()
 sm = ax.tricontourf(x_locs, y_locs, speed_multipliers[0], cmap="coolwarm")
 fig.colorbar(sm, ax=ax, label="Speed multiplier")
-ax.legend(["Initial layout", "Optimized layout", "Optimization boundary"])
+ax.legend(["_Optimization boundary", "Initial layout", "Optimized layout" ])
 ax.set_title("Geometric yaw disabled")
 
 
@@ -144,7 +144,7 @@
 fig = plt.gcf()
 sm = ax.tricontourf(x_locs, y_locs, speed_multipliers[0], cmap="coolwarm")
 fig.colorbar(sm, ax=ax, label="Speed multiplier")
-ax.legend(["Initial layout", "Optimized layout", "Optimization boundary"])
+ax.legend(["_Optimization boundary", "Initial layout", "Optimized layout"])
 ax.set_title("Geometric yaw enabled")
 
 print(

floris/utilities.py

@@ -88,6 +88,107 @@ def wrap_360(x):
 
     return x % 360.0
 
+def check_and_identify_step_size(wind_directions):
+    """
+    This function identifies the step size in a series of wind directions. The function will
+    return the step size if the wind directions are evenly spaced, otherwise it will raise an
+    error.
+
+    Args:
+        wind_directions (np.ndarray): Array of wind directions.
+
+    Returns:
+        float: The step size of the wind directions.
+    """
+
+    if len(wind_directions) < 2:
+        raise ValueError("Array must contain at least 2 elements")
+
+    # First compute the steps between each wind direction
+    steps = np.diff(wind_directions)
+
+    # Confirm that the steps are all positive
+    if not np.all(steps > 0):
+        raise ValueError("wind_directions must be monotonically increasing")
+
+    # Check the step from the last to the first element
+    last_step = wind_directions[0] - wind_directions[-1] + 360
+
+    # If len(window_directions) == 2, then return whichever step is smaller
+    if len(wind_directions) == 2:
+        return min(steps[0], last_step)
+
+    # If len(window_directions) == 3 make some checks
+    elif len(wind_directions) == 3:
+        if np.all(steps == steps[0]):
+            return steps[0]
+        elif steps[0] == last_step:
+            return steps[0]
+        elif steps[1] == last_step:
+            return steps[1]
+        else:
+            raise ValueError("wind_directions must be evenly spaced")
+
+    else:
+        if np.all(steps == steps[0]):
+            return steps[0]
+
+        # If all but one of the steps are the same
+        values, counts = np.unique(steps, return_counts=True)
+
+        # Check for the case where there are more than two different step sizes
+        if len(values) > 2:
+            raise ValueError("wind_directions must be evenly spaced")
+
+        # In the case there are only two step sizes, ensure that one only happens once
+        if np.min(counts) > 1:
+            raise ValueError("wind_directions must be evenly spaced")
+
+        # If the last step equals the most common step, return the most common step
+        if last_step == values[np.argmax(counts)]:
+            return values[np.argmax(counts)]
+
+        raise ValueError("wind_directions must be evenly spaced")
+
+def make_wind_directions_adjacent(wind_directions: NDArrayFloat) -> NDArrayFloat:
+    """
+    This function reorders the wind directions so that they are adjacent. The function will
+    return the reordered wind directions if the wind directions are not adjacent, otherwise it
+    will return the input wind directions
+
+    Args:
+        wind_directions (NDArrayFloat): Array of wind directions.
+
+    Returns:
+        NDArrayFloat: The reordered wind directions to be adjacent.
+    """
+
+    # Check the step size of the wind directions
+    step_size = check_and_identify_step_size(wind_directions)
+
+    # Get a list of steps
+    steps = np.diff(wind_directions)
+
+    # There will be at most one step with a size larger than the step size
+    # If there is one, find it
+    if np.any(steps > step_size):
+        idx = np.argmax(steps)
+
+        # Now change wind_directions such that for each direction after that index
+        # subtract 360 and move that block to the front
+        wind_directions = np.concatenate(
+            (wind_directions[idx+1:] - 360, wind_directions[:idx+1])
+        )
+
+        # Return the wind directions and indices to go from the original to the new
+        sort_indices = np.array(list(range(idx+1,len(wind_directions))) + list(range(idx+1)))
+
+        return wind_directions, sort_indices
+
+    else:
+
+        return wind_directions, np.arange(len(wind_directions))
+
 
 def wind_delta(wind_directions: NDArrayFloat | float):
     """