PVPC trend graph in visu

[JRP]

Thanks for the help.

With random data it works and with the image the graph is loaded on the visualization.

I have the data in the data.lp file. How do I collect it?

I have tried with this

Code:

<? data_pvpc = storage.get('pvpc') local data = {} for i = 1, 24 do   data[ i ] = {     value = data_pvpc   } end local labels = {} for i = 0, 23 do   local label = tostring(i)   if #label == 1 then     label = '0' .. label   end   labels[ #labels + 1 ] = label end for i, item in ipairs(data) do   data[ i ] = item.value / 1000 end local width = 600 local height = 400 local params = {   type = 'line',   data = {     labels = labels,     datasets = {       {         label = 'Prices',         backgroundColor = 'rgb(255, 99, 132)',         borderColor = 'rgb(255, 99, 132)',         data = data,         fill = false,       }     }   },   options = {     title = {       display = true,       text = 'Title',     }   } } local cdata = ngx.escape_uri(require('json').encode(params)) local url = 'https://quickchart.io/chart?w=' .. width .. '&h=' .. height .. '&c=' .. cdata local data = require('socket.http').request(url) header('content-type', 'image/png') write(data)

I returned

Error in /www/user/chart.lp at line 3: attempt to index global 'storage' (a nil value)

I have also tried with local data_pvpc = storage.get('pvpc')

Greeting