Created
February 21, 2020 11:58
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For testing/visualising VSCaptureDrgVent realtime waveforms
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| library(tidyverse) | |
| library(ggplot2) | |
| # Path to folder with CSVs | |
| path <- '~/path/to/folder' | |
| pressure <- read_csv(paste0(path, 'Airway_pressureDrgWaveExport.csv'), | |
| col_names = c('time', 'unix_ms', 'pressure', 'insp'), | |
| col_types = list(col_datetime(format = '%m/%d/%Y %H:%M:%S'), | |
| col_double(), | |
| col_double(), | |
| col_character()), | |
| na = character()) | |
| flow <- read_csv(paste0(path, 'Flow_inspiratory_expiratoryDrgWaveExport.csv'), | |
| col_names = c('time', 'unix_ms', 'flow', 'insp'), | |
| col_types = list(col_datetime(format = '%m/%d/%Y %H:%M:%S'), | |
| col_double(), | |
| col_double(), | |
| col_character()), | |
| na = character()) | |
| comb <- bind_cols(pressure, flow) %>% | |
| select(-ends_with('1')) %>% | |
| mutate(insp = cumsum(insp == 'InspStart'), | |
| rel_ms = unix_ms - first(unix_ms), # Relative Unix timestamp | |
| diff_ms = c(0,diff(unix_ms)), # Consecutive difference between unix timestamps | |
| naive_ms = seq(0, by = 20, along.with = insp)) # Naive calculation of relative time | |
| comb_w_vol <- comb %>% | |
| mutate(dVol = c(flow[1], (flow[1:length(flow)-1] + flow[2:length(flow)])/2) * (1000/60e3) * 20) %>% # Trapezoid integration rule | |
| group_by(insp) %>% | |
| mutate(volume = cumsum(dVol)) %>% | |
| filter(insp != 0) | |
| comb_w_vol %>% | |
| group_by(time) %>% | |
| summarise(n()) | |
| ggplot(comb, aes(naive_ms, flow)) + | |
| geom_line() + | |
| geom_point(data = filter(comb, diff_ms > 100)) | |
| ggplot(comb_w_vol, aes(naive_ms, flow)) + | |
| geom_line() + | |
| facet_wrap(~insp, scales = 'free_x') | |
| ggplot(comb_w_vol, aes(naive_ms, pressure, color = factor(insp))) + | |
| geom_line(show.legend = FALSE) + | |
| scale_color_discrete(limits = sample(1:13)) | |
| # Pressure Volume loop | |
| ggplot(comb_w_vol, aes(pressure, volume, color = factor(insp))) + | |
| geom_path() | |
| # Flow Volume Loop | |
| ggplot(comb_w_vol, aes(volume, flow, color = factor(insp))) + | |
| geom_path() | |
| ggplot(comb_w_vol, aes(naive_ms, volume, color = factor(insp))) + | |
| geom_line() + | |
| geom_point(data = filter(comb_w_vol, diff_ms > 100)) + | |
| geom_line(aes(naive_ms, flow)) | |
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