Running examples in 'ggpubr-Ex.R' failed
The error most likely occurred in:

> ### Name: ggballoonplot
> ### Title: Ballon plot
> ### Aliases: ggballoonplot
> 
> ### ** Examples
> 
> # Define color palette
> my_cols <- c("#0D0887FF", "#6A00A8FF", "#B12A90FF",
+ "#E16462FF", "#FCA636FF", "#F0F921FF")
> 
> # Standard contingency table
> #:::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> # Read a contingency table: housetasks
> # Repartition of 13 housetasks in the couple
> data <- read.delim(
+   system.file("demo-data/housetasks.txt", package = "ggpubr"),
+   row.names = 1
+   )
> data
           Wife Alternating Husband Jointly
Laundry     156          14       2       4
Main_meal   124          20       5       4
Dinner       77          11       7      13
Breakfeast   82          36      15       7
Tidying      53          11       1      57
Dishes       32          24       4      53
Shopping     33          23       9      55
Official     12          46      23      15
Driving      10          51      75       3
Finances     13          13      21      66
Insurance     8           1      53      77
Repairs       0           3     160       2
Holidays      0           1       6     153
> 
> # Basic ballon plot
> ggballoonplot(data)
> 
> # Change color and fill
> ggballoonplot(data, color = "#0073C2FF", fill = "#0073C2FF")
> 
> 
> # Change color according to the value of table cells
> ggballoonplot(data, fill = "value")+
+    scale_fill_gradientn(colors = my_cols)
> 
> # Change the plotting symbol shape
> ggballoonplot(data, fill = "value",  shape = 23)+
+   gradient_fill(c("blue", "white", "red"))
> 
> 
> # Set points size to 8, but change fill color by values
> # Sow labels
> ggballoonplot(data, fill = "value", color = "lightgray",
+               size = 10, show.label = TRUE)+
+   gradient_fill(c("blue", "white", "red"))
> 
> # Streched contingency table
> #:::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> 
> # Create an Example Data Frame Containing Car x Color data
> carnames <- c("bmw","renault","mercedes","seat")
> carcolors <- c("red","white","silver","green")
> datavals <- round(rnorm(16, mean=100, sd=60),1)
> car_data <- data.frame(Car = rep(carnames,4),
+                    Color = rep(carcolors, c(4,4,4,4) ),
+                    Value=datavals )
> 
> car_data
        Car  Color Value
1       bmw    red  62.4
2   renault    red 111.0
3  mercedes    red  49.9
4      seat    red 195.7
5       bmw  white 119.8
6   renault  white  50.8
7  mercedes  white 129.2
8      seat  white 144.3
9       bmw silver 134.5
10  renault silver  81.7
11 mercedes silver 190.7
12     seat silver 123.4
13      bmw  green  62.7
14  renault  green -32.9
15 mercedes  green 167.5
16     seat  green  97.3
> 
> ggballoonplot(car_data, x = "Car", y = "Color",
+               size = "Value", fill = "Value") +
+    scale_fill_gradientn(colors = my_cols) +
+   guides(size = FALSE)
> 
> 
> # Grouped frequency table
> #:::::::::::::::::::::::::::::::::::::::::::::::::::::::::
> data("Titanic")
> dframe <- as.data.frame(Titanic)
> head(dframe)
  Class    Sex   Age Survived Freq
1   1st   Male Child       No    0
2   2nd   Male Child       No    0
3   3rd   Male Child       No   35
4  Crew   Male Child       No    0
5   1st Female Child       No    0
6   2nd Female Child       No    0
> ggballoonplot(
+  dframe, x = "Class", y = "Sex",
+  size = "Freq", fill = "Freq",
+  facet.by = c("Survived", "Age"),
+  ggtheme = theme_bw()
+ )+
+   scale_fill_gradientn(colors = my_cols)
Error in namespaceExport(ns, exports) : 
  undefined exports: %s!=%, %s!==%, %s+%, %s<%, %s<=%, %s==%, %s===%, %s>%, %s>=%, %stri!=%, %stri!==%, %stri+%, %stri<%, %stri<=%, %stri==%, %stri===%, %stri>%, %stri>=%, stri_datetime_add<-, stri_sub<-, stri_subset<-, stri_subset_charclass<-, stri_subset_coll<-, stri_subset_fixed<-, stri_subset_regex<-, stri_c, stri_c_list, stri_cmp, stri_cmp_eq, stri_cmp_equiv, stri_cmp_ge, stri_cmp_gt, stri_cmp_le, stri_cmp_lt, stri_cmp_neq, stri_cmp_nequiv, stri_compare, stri_conv, stri_count, stri_count_boundaries, stri_count_charclass, stri_count_coll, stri_count_fixed, stri_count_regex, stri_count_words, stri_datetime_add, stri_datetime_create, stri_datetime_fields, stri_datetime_format, stri_datetime_fstr, stri_datetime_now, stri_datetime_parse, stri_datetime_symbols, stri_detect, stri_detect_charclass, stri_detect_coll, stri_detect_fixed, stri_detect_regex, stri_dup, stri_duplicated, stri_duplicated_any, stri_enc_detect, stri_enc_detect2, stri_enc_fromutf32, stri_enc_get, stri_enc_inf
Calls: <Anonymous> ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
Execution halted