problem about truncation-Collection of common programming errors

11 years ago
admin
2 minutes

  • Adrian
    r truncation
    Am I missing something?library(truncreg)n <- 10^4 lambda <- 0.3 # Proba y is taken from component 0df <- data.frame(x=rnorm(n)) df$y0 <- pmax(rnorm(n, 10 + df$x, 5), 0) df$y1 <- pmax(rnorm(n, 2 – 5*df$x, 2), 0) df$component <- ifelse(runif(n) < lambda, 0, 1) df$y <- ifelse(df$component == 0, df$y0, df$y1) # Mixture of censored regressionsplot(df$x, df$y)model <- truncreg(y ~ x, data=df) # All data model.w <- truncreg(y ~ x, data=df, weights=component) # Only com

  • Dale
    c++ truncation
    I have just joined a team that has thousands of lines of code like:int x = 0; x=something(); short y=x; doSomethingImportantWith(y); The compiler gives nice warnings saying: Conversion of XX bit type value to “short” causes truncation. I’ve been told that there are no cases where truncation really happens, but I seriously doubt it. Is there a nice way to insert checks into each case having the effect of: if (x>short.max) printNastyError(__FILE,__LINE); before each assignment? Doing this ma

  • Ira Baxter
    windows logging console truncation
    We build complicated console-based tools that produce a lot of commentary on the console. These tools process a lot of data and so runs are expensive and we don’t like to do them more often than necessary, especially during testing where we already have to run them repeatedly. During such tests, we often log the result to a file to capture this commentary for inspection:C:> [ourcommand] >log.txt When the application runs to completion, this works great.If the application crashes (illegal mem

  • Oldskool
    php string truncation mbstring
    Months ago I made a short code that uses mb_strimwidth() to exactly fit some text into a table cell, putting dots at the end of a truncated string. Now, after some times, I tried to execute that same code and it went out with this error:Fatal error: Call to undefined function mb_strimwidth() in …I tried to find the mbstring.php file, and when I found the mb_strimwidth() function, I discovered that it is not implemented anymore. How is that possible? But my main question is: how can I get the s

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