The tutorial @Henrik mentioned is an excellent resource for learning how to create plots with the ggplot2 package. An example with your data: this results in: As mentioned by @user2739472 in the comments: If you only want to change the legend text labels and not the colours from ggplot’s default palette, you can use scale_color_hue(labels = c(“T999”, “T888”)) instead … Read more
Try this (in the psql command-line tool): See the manual for more info.
Gcc 7.1 -O3 these are all identical, godbolt.org/z/a-hc1d – jterm Apr 25 at 3:27 Original answer: Did some digging. Below is an example program and the relevant assembly: Code: Assembly: This was compiled with -std=c++11 -O2. You can see that there is quite a lot more work for the return “”; statement and comparably little for return std::string and return {}; (these … Read more
Based on what you have posted, your movingAverage() function is returning NaN at some point. NaN is a special floating point sentinel value, meaning “Not a Number.” In general, Python prefers raising an exception to returning NaN, so things like sqrt(-1) and log(0.0) will generally raise instead of returning NaN. However, you may get this value back from some other library. A good example might be … Read more
You are reinventing the wheel. Normal PowerShell scripts have parameters starting with -, like script.ps1 -server http://devserver Then you handle them in param section in the beginning of the file. You can also assign default values to your params, read them from console if not available or stop script execution: Inside the script you can simply since all parameters … Read more
To handle HTTP POST requests in Express.js version 4 and above, you need to install the middleware module called body-parser. body-parser extracts the entire body portion of an incoming request stream and exposes it on req.body. The middleware was a part of Express.js earlier but now you have to install it separately. This body-parser module parses the JSON, buffer, string and URL encoded data … Read more
Seems, expected dimension is wrong. Could you try:
ou have a typo in your code:
In C++, things are passed by value unless you specify otherwise using the &-operator (note that this operator is also used as the ‘address-of’ operator, but in a different context). This is all well documented, but I’ll re-iterate anyway: You can also choose to pass a pointer to a vector (void foo(vector<int> *bar)), but unless you … Read more
What you’ve run into is called “shadowing”. You’ve created an object in some namespace (either the global namespace of your module, or the local namespace of a function) that has the same name as a the builtin dict type. This prevents you from accessing the builtin dict in the usual way. You can still get to it, with a bit more … Read more