How to Redraw chart in JavaScript - javascript

I have application which needs to update the chart with the javascript. To do that I have created for loop. However It does not do that.
What is wrong with my code.
Any help is appreciated. Thank You.
JavaScript
plot = function() {
var array = {{preds}}
var classes = {{classes | safe}}
var path2 = "{{imgPut}}"
var img = document.createElement("img");
img.src = path2;
var src = document.getElementById("putimg");
src.appendChild(img);
for (var i = 0; i < array.length;i++) {
var preds = array[i];
console.log(preds)
var chart = new CanvasJS.Chart("chartContainer", {
theme: "light2", // "light1", "light2", "dark1", "dark2"
exportEnabled: true,
animationEnabled: true,
title: {
text: "Analysis Result"
},
data: [{
type: "bar",
legendText: "{label}",
indexLabelFontSize: 16,
indexLabel: "{label} - {y}%",
dataPoints: [
{y: preds[0], label: classes[0]},
{y: preds[1], label: classes[1]},
{y: preds[2], label: classes[2]},
{y: preds[3], label: classes[3]},
]
}]
});
chart.render();
demo();
console.log("After Sleep")
//chart.update();
}
I have tried the chart update as the other answer to the StackOverFlow questions suggested. However I cannot do it, it gives an error.

chart.options.title.text = "Updated Chart Title";
chart.options.data[0].dataPoints.push({y: 23}); // Add a new dataPoint to dataPoints array
chart.options.data[0].dataPoints[3].y = 27; // Update an existing dataPoint
chart.options.title.text = "Updates Chart Title";
chart.options.data = [array]; // Set Array of dataSeries
chart.options.data[0] = {object}; // Set/Replace dataSeries
chart.options.data.push({object}); // Add a new dataSeries
chart.options.data[0].dataPoints = [array]; // Set/Replace dataPoints (array) of dataSeries
chart.options.data[0].dataPoints.push({y: 23}); // Add a new dataPoint to dataPoints array
chart.options.data[0].dataPoints[3] = {y: 23}; // Add/Replace a dataPoint
chart.options.data[0].dataPoints[3].y = 27; // Update an existing dataPoint
chart.options.axisY.maximum = 60; // Set maximum of axisY
See Hear

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So I'm trying to create a plot with BokehJS. This plot needs 3 axes (left, right, bottom):
The plot looks like this
As you can see, the right y-axis is pretty ugly, you can't read any data from towards the bottom as the tickers are bunched up.
This is how im creating my plot and lines
function zip(arr1, arr2, floatCast){
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My question is, how would I be able to make it so that the right y-axis displays better? Preferably I want each tick to be the same distance from each other (ie. space between 10^0 and 10^1 is the same as space between 10^1 and 10^2)
Thanks
I also posted this on the bokeh forums:Here
Fixed my problem:
I believe I may have had some invalid javascript in my original code which is why it wasnt correctly rendering. After hours of messing around with whatever I could think of, it's fixed.
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const y2_range = new Bokeh.Range1d({start: 0.0001, end: 10}); //Cannot use //array for this
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title: 'Example of random data',
tools: "pan,wheel_zoom,box_zoom,reset,save,hover",
toolbar_location: "right",
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height: 600,
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outerWidth: 800,
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x_range: [1, 1000000],
y_range: [-180, -70],
x_axis_type:"log",
x_axis_label: "Offset Frequency (Hz)",
y_axis_label: "Phase Noise (dBc/Hz)",
extra_y_ranges: {"y2_range": y2_range}, //This was incorrect
extra_y_scales: {"y2_range": new Bokeh.LogScale()}, //This was incorrect
major_label_standoff: 5,
});
//Add the second y axis on the right
const second_y_axis = new Bokeh.LogAxis({
y_range_name:"y2_range",
axis_label:'Vibration Profile (g^2/Hz)',
x_range: [1, 1000000],
bounds:[0.0001, 10],
});
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How to load datapoints from array in CanvasJS to make a chart?

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Can you guys help me to solve this problem?
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I am trying to display the percentage of pets per owner in a pie chart, how do i push data to the piechart? the for loop keeps getting a SyntaxError: Unexpected token var. here's my code.
window.onload = function() {
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Error here-->for(var i = 0; i < count; i++){
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Iterate here
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Note: This would be a comment if my rep was higher
I'm not familiar with php returns, but I would first start with manually changing the 'count' variable to be an actual number before moving forward. It appears that your for loop is evaluating the 'count' variable as a string and then throwing the error you're seeing.
https://airbrake.io/blog/javascript-error-handling/unexpected-token

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It should work that way ;-)
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this should do the trick.
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