PHP Charts & Graphs with Multiple Axes

Question

Hi, I want to use PHP Charts & Graphs with Multiple Axes for my project. I have a problem adjusting my datapoint, I need a dynamic array and I wrote it like this: $dataPoints1 = array(); $n=33; $m=34; while($m<$max){ //for ($x=0; $x<$max; $x++) { $dataPoints1[] = array(“x”=> $pieces[$n], “y”=> $pieces[$m]); // } $n=$n+11; $m=$m+11; } print_r($dataPoints1); original code looks like this: $dataPoints1 = array( array(“x”=> 0, “y”=> 0), array(“x”=> 0.05, “y”=> 23), // immer plus 11 array(“x”=> 0.1, “y”=> 12), array(“x”=> 0.15, “y”=> 12), array(“x”=> 0.2, “y”=> 23), array(“x”=> 0.25, “y”=> 24), array(“x”=> 0.3, “y”=> 45), array(“x”=> 0.35, “y”=> 45), array(“x”=> 0.4, “y”=> 34), array(“x”=> 0.45, “y”=> 67), array(“x”=> 0.5, “y”=> 67), array(“x”=> 0.55, “y”=> 43), array(“x”=> 0.6, “y”=> 23), array(“x”=> 0.65, “y”=> 12), array(“x”=> 0.7, “y”=> 23), array(“x”=> 0.75, “y”=> 34), array(“x”=> 0.8, “y”=> 67), array(“x”=> 0.85, “y”=> 90), array(“x”=> 0.9, “y”=> 24), array(“x”=> 0.95, “y”=> 78), array(“x”=> 1, “y”=> 12), array(“x”=> 1.05, “y”=> 90), array(“x”=> 1.1, “y”=> 34), array(“x”=> 1.15, “y”=> 45), array(“x”=> 1.2, “y”=> 78), ); wenn i put my datapoint in javascript part, is not working.

shashiranjan · Answer

Armin,

logarithmic axis can only plot positive values. There simply is no way to put negative values or zero on a logarithmic axis.

Fundamental: If 10L = Z, then L is the logarithm (base 10) of Z. If L is a negative value, then Z is a positive fraction of less than 1.0. If L is zero, then Z equals 1.0. If L is greater than 0, then Z is greater than 1.0. Note that there no value of L will result in a value of Z that is zero or negative. Logarithms are simply not defined for zero or negative numbers.

--
Shashi Ranjan
Team CanvasJS

armin · Answer

@ShashiRanjan,

I have problem in LOG Scale. I have Graph, in Y axis "0" and when I change to Logaritm mode Graf jumps up at datapiont y = 0, because log of "0" is probably not defined. How can I solve this problem.

regard
Armin

shashiranjan · Answer

Armin,

The sample project shared by you doesn't seem to have the sample data. Can you kindly create a JSFiddle reproducing the issue you are facing and share it with us along with the sample data so that we can look into the code and chart-options being used by you to understand the scenario better and help you out?

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Shashi Ranjan
Team CanvasJS

armin · Answer

@ShashiRanjan,

I made a folder in Google Drive. you have to copy PN file in textarea and simulate print. if you select i drop-down Jn (anode). is shown in LIN chart. you can call up LOG in LOG Scale when you print LOG scale. when you see that. if Graf goes to zero in LIN, jump up in LOG area and I don't know why?

https://drive.google.com/drive/folders/1bzaaf6dH5KQtTCKDp5URQsG8Oh-HSDkD?usp=sharing

regard
Armin

shashiranjan · Answer

Armin,

Can you kindly create a JSFiddle reproducing the issue you are facing and share it with us along with the sample data and a brief description of your exact requirement so that we can look into the code and chart-options being used by you to understand the scenario better and help you out?

From what we have observed, sometimes things get delayed mostly when we are not able to reproduce the issue or not able to understand the exact requirements or the solution that we provide may not work properly due to the variation in chart-options being used by you and us.

Having a JSFiddle helps us in figuring out the issue and suggesting an appropriate solution accordingly.

--
Shashi Ranjan
Team CanvasJS

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PHP Charts & Graphs with Multiple Axes