Convenience method for getting voltage and current versus time (step-time)

[jepegit]

One way now to get voltage and current vs time for a specific step is to use something alike:

# first find the correct step
charge_steps = c.get_step_numbers(steptype="charge")
 
cycle = 1
raw = c.cell.raw
charge_step_cycle_one = charge_steps[cycle][0]  # selecting only the first charge step
df_absolutely_all = raw[(raw.cycle_index == cycle) & (raw.step_index == charge_step_cycle_one)]
df_all = df_absolutely_all[["step_time", "current", "voltage"]]

Another way is to use the sget_something methods:

# first find the correct step
charge_steps = c.get_step_numbers(steptype="charge")
 
cycle = 1
raw = c.cell.raw
charge_step_cycle_one = charge_steps[cycle][0]  # selecting only the first charge step

timestamp = c.sget_timestamp(cycle, charge_step_cycle_one )
voltage = c.sget_voltage(cycle, charge_step_cycle_one )

df_all = pd.concat([timestamp, voltage], keys=["time", "voltage"], axis=1)

It would be nice to have one method that takes as input the cycle number, the type of step (e.g. "charge") (or maybe a list of steps), and optional settings like if you would like to select only one step (in case there are more "charge" steps in that cycle), and also if the time should start from zero, or as it is in the raw data, or a starting value given when calling the function.