plot number of circles read from excel

[supriyasenapati]

Hi GerdW,

I cant not find some block as you suggested. I have formed part of program. If you complete rest then i will be grateful to you. I have attached my uncompleted vi file. I am using LabView 13 and windows 7.

Thanks & Regards

Supriyo

[GerdW]

Hi supriya,

you just need to add a shift register to the loop. Then use a BuildArray (set to concat mode) and an additional CDB constant…

[supriyasenapati]

Hi GerdW

I have added shift register. But you have added control (NaN+NaNi). What is this control? and How to add it?

Also you have added a constant (0+0i). How to add this complex constant?

[GerdW]

Hi supriya,

those are numeric constants - of datatype CDB (complex DBL).

You create them as usual by right-clicking the corresponding connector (like shift register input) or by right-clicking a wire of the samt datatype…

To know such basic tasks I recommend to go through all those free online courses offered by NI - and to read the first chapters of the LabVIEW help!

[supriyasenapati]

Hi GerdW,

I have completed circuit and there is no error. But circles are not appearing in output graph.I have attached both vi and excel file

Regards

Supriya

[altenbach]

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supriyasenapati wrote:

I have completed circuit and there is no error. But circles are not appearing in output graph.I have attached both vi and excel file

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• You initialize the shift register with an array containing one element. Use an empty array instead!
• You use an "expression node" instead of "convert unit". Why not do the ramp from 0..2pi and avoid the conversion entirely?
• You should not autscale the graph axes, they both need to be the same lenght to get circles.
• You could use a concatenating output tunnel instead of the initialized shift register (not shown).
• ...

[altenbach · Accepted solution]

Here's a slightly cleaned up version using a concatenating tunnel and some other simplifications.

 

[supriyasenapati]

Hi altenbach,

I cant understand the meaning of the constant (NaN + NaN i). When i removed this constant two small lines appeared into the graph.

Regards

Supriyo

[GerdW]

Hi Supriyo,

so with this constant there are no lines, but after removing it there are? That exactly is the purpose!

Reason for this behaviour: NaN values are omitted from plotting, so you can "fake" individual plots with just one data array…

[supriyasenapati]

Hi GerdW,

Why unnecessary lines comes when there in no NaN valuses ? 

Regards

Supriyo Senapati