Error:attempt to apply non-function

You’re missing *s in the last two terms of your expression, so R is interpreting (e.g.) 0.207 (log(DIAM93))^2 as an attempt to call a function named 0.207 … For example: Error: attempt to apply non-function Your (unreproducible) expression should read: Mathematica is the only computer system I know of that allows juxtaposition to be used for multiplication …

Eclipse returns error message “Java was started but returned exit code = 1”

The error message points to a problem with your Java version. Do you have a JDK installed? Try adding the following (noting the new line): /!\ make sure, that the -vm option occurs before the -vmargs command. Everything after -vmargs is passed directly to the JVM. …to your eclipse.ini file, pointing to the JDK you … Read more

Is there a TRY CATCH command in Bash

Is there a TRY CATCH command in Bash? No. Bash doesn’t have as many luxuries as one can find in many programming languages. There is no try/catch in bash; however, one can achieve similar behavior using && or ||. Using ||: if command1 fails then command2 runs as follows Similarly, using &&, command2 will run if command1 is successful The closest approximation of try/catch is as follows Also bash contains some error … Read more

How to make a histogram from a list of data

do you have any idea how to make 200 evenly spaced out bins, and have your program store the data in the appropriate bins? You can, for example, use NumPy’s arange for a fixed bin size (or Python’s standard range object), and NumPy’s linspace for evenly spaced bins. Here are 2 simple examples from my matplotlib gallery Fixed bin size … Read more

How do I fix “Undefined variable” error in PHP?

Today, I have started to learn PHP. And, I have created my first PHP file to test different variables. You can see my file as follows. I have found the following errors when I have run this file in the browser. Notice: Undefined variable: x in /opt/lampp/htdocs/anand/php/index.php on line 19 Notice: Undefined variable: y in … Read more

What does ‘index 0 is out of bounds for axis 0 with size 0’ mean?

In numpy, index and dimension numbering starts with 0. So axis 0 means the 1st dimension. Also in numpy a dimension can have length (size) 0. The simplest case is: I also get it if x = np.zeros((0,5), int), a 2d array with 0 rows, and 5 columns. So someplace in your code you are creating an array with a size … Read more

How to handle ETIMEDOUT error?

This is caused when your request response is not received in given time(by timeout request module option). Basically to catch that error first, you need to register a handler on error, so the unhandled error won’t be thrown anymore: out.on(‘error’, function (err) { /* handle errors here */ }). Some more explanation here. In the handler you can check if … Read more

PHP Notice: Undefined offset: 1 with array when reading data

Change to or simply: Not every line of your file has a colon in it and therefore explode on it returns an array of size 1. According to php.net possible return values from explode: Returns an array of strings created by splitting the string parameter on boundaries formed by the delimiter. If delimiter is an empty string … Read more