JavaScript > Basic Charts > Line Charts
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Line Charts in JavaScript

How to make D3.js-based line charts in JavaScript.


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Basic Line Plot 

var trace1 = {
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  type: 'scatter'
};

var trace2 = {
  x: [1, 2, 3, 4],
  y: [16, 5, 11, 9],
  type: 'scatter'
};

var data = [trace1, trace2];

Plotly.newPlot('myDiv', data);

 
Click to copy
11.522.533.546810121416
trace 0trace 1

Line and Scatter Plot 

var trace1 = {
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  mode: 'markers'
};

var trace2 = {
  x: [2, 3, 4, 5],
  y: [16, 5, 11, 9],
  mode: 'lines'
};

var trace3 = {
  x: [1, 2, 3, 4],
  y: [12, 9, 15, 12],
  mode: 'lines+markers'
};

var data = [ trace1, trace2, trace3 ];

var layout = {
  title: {text: 'Line and Scatter Plot'}
};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
11.522.533.544.556810121416
trace 0trace 1trace 2Line and Scatter Plot

Adding Names to Line and Scatter Plot 

var trace1 = {
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  mode: 'markers',
  name: 'Scatter'
};

var trace2 = {
  x: [2, 3, 4, 5],
  y: [16, 5, 11, 9],
  mode: 'lines',
  name: 'Lines'
};

var trace3 = {
  x: [1, 2, 3, 4],
  y: [12, 9, 15, 12],
  mode: 'lines+markers',
  name: 'Scatter + Lines'
};

var data = [ trace1, trace2, trace3 ];

var layout = {
  title: {text: 'Adding Names to Line and Scatter Plot'}
};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
11.522.533.544.556810121416
ScatterLinesScatter + LinesAdding Names to Line and Scatter Plot

Line and Scatter Styling 

var trace1 = {
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  mode: 'markers',
  marker: {
    color: 'rgb(219, 64, 82)',
    size: 12
  }
};

var trace2 = {
  x: [2, 3, 4, 5],
  y: [16, 5, 11, 9],
  mode: 'lines',
  line: {
    color: 'rgb(55, 128, 191)',
    width: 3
  }
};

var trace3 = {
  x: [1, 2, 3, 4],
  y: [12, 9, 15, 12],
  mode: 'lines+markers',
  marker: {
    color: 'rgb(128, 0, 128)',
    size: 8
  },
  line: {
    color: 'rgb(128, 0, 128)',
    width: 1
  }
};

var data = [trace1, trace2, trace3];

var layout = {
  title: {
    text: 'Line and Scatter Styling'
  }
};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
11.522.533.544.55681012141618
trace 0trace 1trace 2Line and Scatter Styling

Styling Line Plot 

trace1 = {
  type: 'scatter',
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  mode: 'lines',
  name: 'Red',
  line: {
    color: 'rgb(219, 64, 82)',
    width: 3
  }
};

trace2 = {
  type: 'scatter',
  x: [1, 2, 3, 4],
  y: [12, 9, 15, 12],
  mode: 'lines',
  name: 'Blue',
  line: {
    color: 'rgb(55, 128, 191)',
    width: 1
  }
};

var layout = {
  width: 500,
  height: 500
};

var data = [trace1, trace2];

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
123491011121314151617
RedBlue

Colored and Styled Scatter Plot 

var trace1 = {
  x: [52698, 43117],
  y: [53, 31],
  mode: 'markers',
  name: 'North America',
  text: ['United States', 'Canada'],
  marker: {
    color: 'rgb(164, 194, 244)',
    size: 12,
    line: {
      color: 'white',
      width: 0.5
    }
  },
  type: 'scatter'
};

var trace2 = {
  x: [39317, 37236, 35650, 30066, 29570, 27159, 23557, 21046, 18007],
  y: [33, 20, 13, 19, 27, 19, 49, 44, 38],
  mode: 'markers',
  name: 'Europe',
  text: ['Germany', 'Britain', 'France', 'Spain', 'Italy', 'Czech Rep.', 'Greece', 'Poland'],
  marker: {
    color: 'rgb(255, 217, 102)',
    size: 12
  },
  type: 'scatter'
};

var trace3 = {
  x: [42952, 37037, 33106, 17478, 9813, 5253, 4692, 3899],
  y: [23, 42, 54, 89, 14, 99, 93, 70],
  mode: 'markers',
  name: 'Asia/Pacific',
  text: ['Australia', 'Japan', 'South Korea', 'Malaysia', 'China', 'Indonesia', 'Philippines', 'India'],
  marker: {
    color: 'rgb(234, 153, 153)',
    size: 12
  },
  type: 'scatter'
};

var trace4 = {
  x: [19097, 18601, 15595, 13546, 12026, 7434, 5419],
  y: [43, 47, 56, 80, 86, 93, 80],
  mode: 'markers',
  name: 'Latin America',
  text: ['Chile', 'Argentina', 'Mexico', 'Venezuela', 'Venezuela', 'El Salvador', 'Bolivia'],
  marker: {
    color: 'rgb(142, 124, 195)',
    size: 12
  },
  type: 'scatter'
};

var data = [trace1, trace2, trace3, trace4];

var layout = {
  title: {
    text: 'Quarter 1 Growth'
  },
  xaxis: {
    title: {
      text: 'GDP per Capita'
    },
    showgrid: false,
    zeroline: false
  },
  yaxis: {
    title: {
      text: 'Percent'
    },
    showline: false
  }
};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
10k20k30k40k50k20406080100
North AmericaEuropeAsia/PacificLatin AmericaQuarter 1 GrowthGDP per CapitaPercent

Line Shape Options for Interpolation 

var trace1 = {
  x: [1, 2, 3, 4, 5],
  y: [1, 3, 2, 3, 1],
  mode: 'lines+markers',
  name: 'linear',
  line: {shape: 'linear'},
  type: 'scatter'
};

var trace2 = {
  x: [1, 2, 3, 4, 5],
  y: [6, 8, 7, 8, 6],
  mode: 'lines+markers',
  name: 'spline',
  text: ['tweak line smoothness<br>with "smoothing" in line object', 'tweak line smoothness<br>with "smoothing" in line object', 'tweak line smoothness<br>with "smoothing" in line object', 'tweak line smoothness<br>with "smoothing" in line object', 'tweak line smoothness<br>with "smoothing" in line object', 'tweak line smoothness<br>with "smoothing" in line object'],
  line: {shape: 'spline'},
  type: 'scatter'
};

var trace3 = {
  x: [1, 2, 3, 4, 5],
  y: [11, 13, 12, 13, 11],
  mode: 'lines+markers',
  name: 'vhv',
  line: {shape: 'vhv'},
  type: 'scatter'
};

var trace4 = {
  x: [1, 2, 3, 4, 5],
  y: [16, 18, 17, 18, 16],
  mode: 'lines+markers',
  name: 'hvh',
  line: {shape: 'hvh'},
  type: 'scatter'
};

var trace5 = {
  x: [1, 2, 3, 4, 5],
  y: [21, 23, 22, 23, 21],
  mode: 'lines+markers',
  name: 'vh',
  line: {shape: 'vh'},
  type: 'scatter'
};

var trace6 = {
  x: [1, 2, 3, 4, 5],
  y: [26, 28, 27, 28, 26],
  mode: 'lines+markers',
  name: 'hv',
  line: {shape: 'hv'},
  type: 'scatter'
};

var data = [trace1, trace2, trace3, trace4, trace5, trace6];

var layout = {
  legend: {
    y: 0.5,
    traceorder: 'reversed',
    font: {size: 16},
    yref: 'paper'
  }};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
11.522.533.544.550510152025
hvvhhvhvhvsplinelinear

Graph and Axes Titles 

var trace1 = {
  x: [1, 2, 3, 4],
  y: [10, 15, 13, 17],
  mode: 'markers',
  name: 'Scatter'
};

var trace2 = {
  x: [2, 3, 4, 5],
  y: [16, 5, 11, 9],
  mode: 'lines',
  name: 'Lines'
};

var trace3 = {
  x: [1, 2, 3, 4],
  y: [12, 9, 15, 12],
  mode: 'lines+markers',
  name: 'Scatter and Lines'
};

var data = [trace1, trace2, trace3];

var layout = {
  title: {
    text: 'Title of the Graph'
  },
  xaxis: {
    title: {
      text: 'x-axis title'
    }
  },
  yaxis: {
    title: {
      text: 'y-axis title'
    }
  }
};

Plotly.newPlot('myDiv', data, layout);
 
Click to copy
11.522.533.544.556810121416
ScatterLinesScatter and LinesTitle of the Graphx-axis titley-axis title

Line Dash 

var trace1 = {
  x: [1, 2, 3, 4, 5],
  y: [1, 3, 2, 3, 1],
  mode: 'lines',
  name: 'Solid',
  line: {
    dash: 'solid',
    width: 4
  }
};

var trace2 = {
  x: [1, 2, 3, 4, 5],
  y: [6, 8, 7, 8, 6],
  mode: 'lines',
  name: 'dashdot',
  line: {
    dash: 'dashdot',
    width: 4
  }
};

var trace3 = {
  x: [1, 2, 3, 4, 5],
  y: [11, 13, 12, 13, 11],
  mode: 'lines',
  name: 'Solid',
  line: {
    dash: 'solid',
    width: 4
  }
};

var trace4 = {
  x: [1, 2, 3, 4, 5],
  y: [16, 18, 17, 18, 16],
  mode: 'lines',
  name: 'dot',
  line: {
    dash: 'dot',
    width: 4
  }
};

var data = [trace1, trace2, trace3, trace4];

var layout = {
  title: {
    text: 'Line Dash'
  },
  xaxis: {
    range: [0.75, 5.25],
    autorange: false
  },
  yaxis: {
    range: [0, 18.5],
    autorange: false
  },
  legend: {
    y: 0.5,
    traceorder: 'reversed',
    font: {
      size: 16
    }
  }
};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
11.522.533.544.55051015
dotSoliddashdotSolidLine Dash

Connect Gaps Between Data 

var trace1 = {
  x: [1, 2, 3, 4, 5, 6, 7, 8],
  y: [10, 15, null, 17, 14, 12, 10, null, 15],
  mode: 'lines+markers',
  connectgaps: true
};

var trace2 = {
  x: [1, 2, 3, 4, 5, 6, 7, 8],
  y: [16, null, 13, 10, 8, null, 11, 12],
  mode: 'lines',
  connectgaps: true
};

var data = [trace1, trace2];

var layout = {
  title: {
    text: 'Connect the Gaps Between Data'
  },
  showlegend: false
};

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
12345678810121416
Connect the Gaps Between Data

Labelling Lines with Annotations 

var xData = [
  [2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013],
  [2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013],
  [2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013],
  [2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013]
];

var yData = [
  [74, 82, 80, 74, 73, 72, 74, 70, 70, 66, 66, 69],
  [45, 42, 50, 46, 36, 36, 34, 35, 32, 31, 31, 28],
  [13, 14, 20, 24, 20, 24, 24, 40, 35, 41, 43, 50],
  [18, 21, 18, 21, 16, 14, 13, 18, 17, 16, 19, 23]
];

var colors = ['rgba(67,67,67,1)', 'rgba(115,115,115,1)', 'rgba(49,130,189, 1)',
  'rgba(189,189,189,1)'
];

var lineSize = [2, 2, 4, 2];

var labels = ['Television', 'Newspaper', 'Internet', 'Radio'];

var data = [];

for ( var i = 0 ; i < xData.length ; i++ ) {
  var result = {
    x: xData[i],
    y: yData[i],
    type: 'scatter',
    mode: 'lines',
    line: {
      color: colors[i],
      width: lineSize[i]
    }
  };
  var result2 = {
    x: [xData[i][0], xData[i][11]],
    y: [yData[i][0], yData[i][11]],
    type: 'scatter',
    mode: 'markers',
    marker: {
      color: colors[i],
      size: 12
    }
  };
  data.push(result, result2);
}

var layout = {
  showlegend: false,
  height: 600,
  width: 600,
  xaxis: {
    showline: true,
    showgrid: false,
    showticklabels: true,
    linecolor: 'rgb(204,204,204)',
    linewidth: 2,
    tickmode: 'linear',
    ticks: 'outside',
    tickcolor: 'rgb(204,204,204)',
    tickwidth: 2,
    ticklen: 5,
    tickfont: {
      family: 'Arial',
      size: 12,
      color: 'rgb(82, 82, 82)'
    }
  },
  yaxis: {
    showgrid: false,
    zeroline: false,
    showline: false,
    showticklabels: false
  },
  autosize: false,
  margin: {
    autoexpand: false,
    l: 100,
    r: 20,
    t: 100
  },
  annotations: [
    {
      xref: 'paper',
      yref: 'paper',
      x: 0.0,
      y: 1.05,
      xanchor: 'left',
      yanchor: 'bottom',
      text: 'Main Source for News',
      font:{
        family: 'Arial',
        size: 30,
        color: 'rgb(37,37,37)'
      },
      showarrow: false
    },
    {
      xref: 'paper',
      yref: 'paper',
      x: 0.5,
      y: -0.1,
      xanchor: 'center',
      yanchor: 'top',
      text: 'Source: Pew Research Center & Storytelling with data',
      showarrow: false,
      font: {
        family: 'Arial',
        size: 12,
        color: 'rgb(150,150,150)'
      }
    }
  ]
};

for( var i = 0 ; i < xData.length ; i++ ) {
  var result = {
    xref: 'paper',
    x: 0.05,
    y: yData[i][0],
    xanchor: 'right',
    yanchor: 'middle',
    text: labels[i] + ' ' + yData[i][0] +'%',
    showarrow: false,
    font: {
      family: 'Arial',
      size: 16,
      color: 'black'
    }
  };
  var result2 = {
    xref: 'paper',
    x: 0.95,
    y: yData[i][11],
    xanchor: 'left',
    yanchor: 'middle',
    text: yData[i][11] +'%',
    font: {
      family: 'Arial',
      size: 16,
      color: 'black'
    },
    showarrow: false
  };

  layout.annotations.push(result, result2);
}

Plotly.newPlot('myDiv', data, layout);

 
Click to copy
2001200220032004200520062007200820092010201120122013
Main Source for NewsSource: Pew Research Center & Storytelling with dataTelevision 74%69%Newspaper 45%28%Internet 13%50%Radio 18%23%