Question 170176 in Debian Question posted in
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Why isn’t the package installed by npm found in Debian?

I am working on Debian Stable Linux which is updated and working very well.

I have installed a compute-pcorr package globally with following npm command:

$ sudo npm install compute-pcorr -g

It is listed with following npm command:

$  npm list -g --depth=0 
/usr/local/lib
├── [email protected]
└── [email protected]

I am now trying following code demo code from its homepage:

var pcorr = require( '[email protected]' ); 

var x = [ 1, 2, 3, 4, 5 ]; 
var y = [ 5, 4, 3, 2, 1 ];

var mat = pcorr( x, y );
Console.log("Correlation Matrix: "+ mat)

However, when I run above code, I get error:

$ node compute_pcorr_usage.js 

internal/modules/cjs/loader.js:818
  throw err;
  ^

Error: Cannot find module '[email protected]'

Following in code is also not working:

var pcorr = require( 'compute-pcorr' );

I also tried to reinstall package with following command, but error persists:

sudo npm install compute-pcorr -g --save

Where is the problem and how can it be solved?

Tags:

2

Answers


  1. 0

    This issue happens when the library is not installed locally.
    Try installing locally in your directory with the command npm install compute-pcorr
    There’s no need of installing globally via -g

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  2. 0

    The problem seems to be with the way you are requiring the compute-pcorr module in your code. Instead of specifying the version in the require statement, you should simply use require('compute-pcorr').

    Here’s the corrected code:

    var pcorr = require('compute-pcorr');

var x = [1, 2, 3, 4, 5];
var y = [5, 4, 3, 2, 1];

var mat = pcorr(x, y);
console.log("Correlation Matrix: " + mat);

    By removing the version number from the require statement, Node.js will search for the installed module without considering a specific version.

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