I am using the following Gnuplot script :

##### Definitions ####
a=0.3
s0=10.
s1=-9.999
r1u(x)=-exp(x)*(-1+a+a*exp(x))/((1+exp(x))**3)
r2u(x)=exp(x)*(1-exp(x))*(-1+a+a*exp(x))/((1+exp(x))**4)
f1(c,d)=s0*c*(1-2*a)/2. + s1*r1u(d)
f2(c,d)=1./(3.*c) - s0*c/6.

Is it possible to plot data in excel without having to define the function of the data in an extra column?

Think of this simplified example:

There are two columns with numbers A and B.

I have a word file which has some excel plots in it. Unfortunately I lost the original excel plots and the word file is now 'de-linked'. Is there a way to retrieve the lost data for the plots? Just copying the plot back to excel does not seem to work, but I can see that the data is still there somewhere, because hovering over a dot on the plot shows the values.

So in my lab last week we were supposed to make an rc circuit and plot the current and voltage over time. As we all know, this is an exponential decay function and current should follow
.
In this lab, a time constant was chosen to be so large so that the students could observe the change over time.

Is there any plot digitizer usable in Excel?

Hi,
Does anyone know if there is a way to do a nyquist plot (real Z) vs (Imag Z) in ORCAD SPICE?
I would like to obtain this type of plot for a capacitor and/or battery circuit model such as the Randles cell which is R in series with R || C.

Once I am able to create nyquist plot, then I can go one and refine/tweak the cell model.

I can do a BODE plot just fine and get Phase, Ma

I am using the compass plot function using octave 3.8.1 Linux to plot a circular data set but I have difficulties changing the axis of this plot.

Specifically, I would like to remove some of the axis points (say for example the 30 and 60 degrees) and also I would like to change numbers (for example instead of 90 write 30).

Does anyone have an idea of how this can be done?

Example of code: Al

Subject says it. I have multiple files I need to plot overlaying each other. Some of them may be empty. Is there a way to have it ignore the "Skipping data file with no valid points" error and just continue plotting? Here is my plot statement. the 9682 and/or 967E data files may be empty, but I need to see any data in either that is there.

I have problem with zooming into plot after move from Windows to Linux (Ubuntu) in R.
On these data

libs <- c('quantmod','zoom')
lapply(libs, require, character.only = T)
getSymbols('NOK',from="2013-01-01") # zde vložit vybraný ticker
data_all<-NOK
dC<-data_all[,4]

On Windows I did this

plot(dC,type='o')
zm()

And I saw an interactive plot where I was allowed to move by H,J,K,L keys.