| Server IP : 79.136.114.73 / Your IP : 3.133.115.157 Web Server : Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.29 OpenSSL/1.0.1f System : Linux b8009 3.13.0-170-generic #220-Ubuntu SMP Thu May 9 12:40:49 UTC 2019 x86_64 User : www-data ( 33) PHP Version : 5.5.9-1ubuntu4.29 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority, MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /var/www/appsrv.astacus.se/shellyctr/js/package/dist/docs/assets/js/ |
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(window.webpackJsonp=window.webpackJsonp||[]).push([[185],{515:function(n,t,a){"use strict";a.r(t);var i=a(6),e=Object(i.a)({},(function(){var n=this,t=n.$createElement,a=n._self._c||t;return a("ContentSlotsDistributor",{attrs:{"slot-key":n.$parent.slotKey}},[a("h1",{attrs:{id:"data-decimation"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#data-decimation"}},[n._v("#")]),n._v(" Data Decimation")]),n._v(" "),a("p",[n._v("This example shows how to use the built-in data decimation to reduce the number of points drawn on the graph for improved performance.")]),n._v(" "),a("chart-editor",{attrs:{code:"// <block:actions:3>\nconst actions = [\n {\n name: 'No decimation (default)',\n handler(chart) {\n chart.options.plugins.decimation.enabled = false;\n chart.update();\n }\n },\n {\n name: 'min-max decimation',\n handler(chart) {\n chart.options.plugins.decimation.algorithm = 'min-max';\n chart.options.plugins.decimation.enabled = true;\n chart.update();\n },\n },\n {\n name: 'LTTB decimation (50 samples)',\n handler(chart) {\n chart.options.plugins.decimation.algorithm = 'lttb';\n chart.options.plugins.decimation.enabled = true;\n chart.options.plugins.decimation.samples = 50;\n chart.update();\n }\n },\n {\n name: 'LTTB decimation (500 samples)',\n handler(chart) {\n chart.options.plugins.decimation.algorithm = 'lttb';\n chart.options.plugins.decimation.enabled = true;\n chart.options.plugins.decimation.samples = 500;\n chart.update();\n }\n }\n];\n// </block:actions>\n\n// <block:data:1>\nconst NUM_POINTS = 100000;\nUtils.srand(10);\n\n// parseISODate returns a luxon date object to work with in the samples\n// We will create points every 30s starting from this point in time\nconst start = Utils.parseISODate('2021-04-01T00:00:00Z').toMillis();\nconst pointData = [];\n\nfor (let i = 0; i < NUM_POINTS; ++i) {\n // Most data will be in the range [0, 20) but some rare data will be in the range [0, 100)\n const max = Math.random() < 0.001 ? 100 : 20;\n pointData.push({x: start + (i * 30000), y: Utils.rand(0, max)});\n}\n\nconst data = {\n datasets: [{\n borderColor: Utils.CHART_COLORS.red,\n borderWidth: 1,\n data: pointData,\n label: 'Large Dataset',\n radius: 0,\n }]\n};\n// </block:data>\n\n// <block:decimation:0>\nconst decimation = {\n enabled: false,\n algorithm: 'min-max',\n};\n// </block:decimation>\n\n// <block:setup:2>\nconst config = {\n type: 'line',\n data: data,\n options: {\n // Turn off animations and data parsing for performance\n animation: false,\n parsing: false,\n\n interaction: {\n mode: 'nearest',\n axis: 'x',\n intersect: false\n },\n plugins: {\n decimation: decimation,\n },\n scales: {\n x: {\n type: 'time',\n ticks: {\n source: 'auto',\n // Disabled rotation for performance\n maxRotation: 0,\n autoSkip: true,\n }\n }\n }\n }\n};\n// </block:setup>\n\nmodule.exports = {\n actions: actions,\n config: config,\n};\n"}}),a("h2",{attrs:{id:"docs"}},[a("a",{staticClass:"header-anchor",attrs:{href:"#docs"}},[n._v("#")]),n._v(" Docs")]),n._v(" "),a("ul",[a("li",[a("RouterLink",{attrs:{to:"/configuration/decimation.html"}},[n._v("Data Decimation")])],1),n._v(" "),a("li",[a("RouterLink",{attrs:{to:"/charts/line.html"}},[n._v("Line")])],1),n._v(" "),a("li",[a("RouterLink",{attrs:{to:"/axes/cartesian/time.html"}},[n._v("Time Scale")])],1)])],1)}),[],!1,null,null,null);t.default=e.exports}}]);