coast | closely patterned after Kafka 's topics

I am assuming that you will be replacing all the number in the string which only have a closing quote (missing opening one).

In that case you can use the following pattern matching.

Updated

$route.params returns String as default where as your id in store.js is Number.

Therefore

You can use count to find the count of Species in each month. Try -

In OpenMDAO V3.9.0 a feature was added that detects rows and columns of all 0 in the total derivative Jacobian. A row of all 0's means that an objective or constraint is not impacted by any of the design variables. A column of all 0's means that a design variable does not impact any constraint or objective values.

Both of these situations are potentially problematic. A 0 column means that there are less degrees of freedom than you might think, since that DV doesn't affect anything. This isn't fatal, but it is still something that is worth warning a user about.

A 0 row is much more problematic. If it the row is associated with a constraint, it means the optimizer has no ability to satisfy that constraint. You may get "lucky" and find that the constraint happens that the constraint happens to be satisfied at the initial condition anyway, and so you can technically solve the optimization problem (your specific case is likely one of these). However, mathematically the problem is singular, and unless the optimizer you using has specific code to handle this corner case it can make things difficult.

One of the primary reasons this feature was added was that the OpenMDAO dev team noticed that Dymos users were particularly prone to accidentally creating 0 rows when adding linkage and path constraints. Often these 0 rows seem to not cause harm, but we have definitely also seen cases where they give the optimizer fits. The warning helps you identify the problem so you can correct it.

In this case, it looks like you have two separate 0 rows.

1. traj.linkages.stage_1_grav_turn:alpha_final|coast_1:alpha_initial means that none of the design variables you've given to the optimizer affect that constraint. Likely this means that you have specified both alpha_final and alpha_initial as fixed_final and fixed_initial respectively. You're getting away with it because the initial conditions you provided must have both alphas equal by construction. You would still be better off either removing the constraint, or adding at least one end of the linkage or the other as a design variable.

2. traj.phases.stage_1_maneuver.path_constraints.path:q_alpha means that at least one of the entries in your path constraint is not affected by any DV. It is likely not the entire path constraint, but just one end of it that is fixed because its computed from fixed boundary conditions. In this case, you can simply add indices to the add_path_constraint call to exclude the first or last point from the constraint.

Since your optimization is running, the 0 rows aren't killing you. However, its good practice to clean this up. It's possible that not having them will improve performance now, or it may save you from a future situation where the optimization "mysteriously" stops working because you somehow trigger a situation where the optimizer can no longer handle the 0 rows.

You can use ListedColormap with BoundaryNorm to generate your custom discrete colorbar. Here is an example using cartopy:

Order them by the integer values in the element names, after stripping the "text" part.

Your question doesn't make a lot of sense, because it's imposing bizarre restrictions that we can't really assess, but I don't mind telling you how to join two joins

You already know how to join three tables in the normal/traditional/sensible sense. Here's how to join them as you ask:

You should use timestamptz (timestamp with time zone) instead of timestamp (timestamp without time zone) to avoid any time zone confusion. In the table, in the function, in the whole food chain. Values are always stored as UTC time internally then, and comparisons work correctly automatically (comparing points in time independent of time zones).

See:

• Ignoring time zones altogether in Rails and PostgreSQL

Either way, both types have microsecond resolution, i.e. 6 factional decimal digits. Your first example got truncated somehow, possibly by your client in the display.

If there is no spaces in "list 2" items. This way you can.