Data Properties
From QuB
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The Data Properties dialog lets you edit display settings, experimental variables and structural properties of a data file. To see the Properties of a data file, double-click its name in the Data window, or right-click in the background of the Data window and choose "Properties."
All properties are saved alongside the data file in a Session file. New files, and data without a session file, inherit the display settings of the last open data file. Use the Presets menu (lower right) to save properties as a preset, or set them from an existing preset. There are separate presets for
- Colors and Display
- Structure (e.g. Sampling) -- these are shared with the New Data and Open Data dialogs
- Experimental conditions -- these are shared with Simulation Properties and can be loaded in the New Data dialog
Contents |
Colors
- Background
- behind the data traces
- Selection
- selected data
- Cursor
- arrows pointing to the current data point
- Segment break
- arrows pointing to a break between segments, if Change trace on break is unchecked
- Baseline
- the horizontal line through 0
- Baseline nodes
- dots and the lines connecting them; see Data Theory#Baseline
- Idealized
- the idealization
- Frame
- the line between the margin and the picture
- Panel
- the margin
- Selection list
- background behind data in the current list, if Draw selection list is checked
- Segment label
- background text with the segment number, if Draw segment labels is checked
- Data
- color of the trace for each A/D channel
Display
- Traces per page
- number of traces in the low-res panel
- Points per trace
- number of samples in each trace
- Cache size
- number of megapoints (millions of samples) to keep in memory
- must be larger than traces-per-page X points-per-trace
- Margins
- distance between the window edges and the picture
- Change trace on break
- start a new data segment on a new line
- Overlap channels
- Draw all A/D channels on top of each other
- Overlap traces
- Draw traces on top of each other. Only traces-per-page will be drawn; you can scroll
- Draw points
- draw the trace as connected dots when there's enough space (few enough datapoints)
- Draw inverted
- flip the traces so positive values are drawn under 0
- Draw baseline
- draw a horizontal line through y=0
- Draw baseline nodes
- draw the linear baseline correction as dots and the lines connecting them; see Data Theory#Baseline
- Draw segment labels
- write the segment number in the background to the right of the data
- Draw selection list
- color the background behind selections in the current list, and label them
- Auto scale
- make the smallest and largest values in the visible portion fit onscreen
- Draw mode
- slow
- normal
- fast
- Draw raster
- Draw idealized
- show the idealization
- above data
- show it above the data trace, in parallel, instead of overlaid
- colored
- draw each event using its class-color from the model (ie black and red)
The following properties are per- A/D channel:
- Visible
- show or hide this channel
- Baseline On
- subtract the baseline described by the baseline nodes
- Filter On
- filter this channel with a low-pass filter
- Moving average
- use a fast but less-accurate moving-average filter
- Frequency
- cutoff for the low-pass filter
- Moving average points
- Data Y Min
- integer (unscaled) value at the bottom of the trace, if "Auto scale" is unchecked
- Data Y Max
- integer (unscaled) value at the top of the trace, if "Auto scale" is unchecked
Data
- Sampling
- the number of points per second in the file. It can be specified in [kHz] (10 kHz = 10000 samples per second) or in [ms] (milliseconds per sample). Changing either the [kHz] or [ms] value will also update the other value
- A/D Scaling
- see Data Theory#Basic Structure
The following properties are per A/D channel:
- Channel name
- a descriptive label
- Units
- physical units represented by this channel
- Scaling
- conversion factor between acquisition units in the file and physical units
- see Data Theory#Choosing a Scaling value about how to calculate Scaling using a peak of known amplitude
Experimental Conditions
This is a list of variables such as Ligand concentration and Voltage, used by the model and optimizers. A variable can have a constant Value, or can be assigned to an A/D channel. Only a few algorithms such as Mac and MIP can use non-constant variables. Those algorithms also look at the Conditioning value -- conditions held before the recording -- to set entry probabilities. In this panel you can
- Edit Value/Channel and Conditioning: Make Channel blank to use a constant Value
- Add a new variable
- Delete the selected variable
- Load/Save Presets: Presets can be
- loaded into another data file (in its Properties)
- loaded for a simulation (in Simulation Properties)
- loaded into a new data file (in the New Data dialog)
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