r - Error in if/while (condition) {: missing Value where TRUE/FALSE needed -


i received error message:

error in if (condition) { : missing value true/false needed

or

error in while (condition) { : missing value true/false needed

what mean, , how prevent it?

the evaluation of condition resulted in na. if conditional must have either true or false result. 

if (na) {} ## error in if (na) { : missing value true/false needed

this can happen accidentally results of calculations:

if(true && sqrt(-1)) {} ## error in if (true && sqrt(-1)) { : missing value true/false needed

to test whether object missing use is.na(x) rather x == na.

see related errors:

error in if/while (condition) { : argument of length zero

error in if/while (condition) : argument not interpretable logical

if (null) {} ## error in if (null) { : argument of length 0  if ("not logical") {} ## error: argument not interpretable logical  if (c(true, false)) {} ## warning message: ## condition has length > 1 , first element used

Comments

Post a Comment

Popular posts from this blog

How to group boxplot outliers in gnuplot -

i have large set of data points. try plot them boxplot, of outliers exact same value , represented on line beside each other. found how set horizontal distance between outliers in gnuplot boxplot , doesn't much, apparently not possible. is possible group outliers together, print 1 point , print number in brackets beside indicate how many points there are? think make more readable in graph. for information, have 3 boxplots 1 x value , times 6 in 1 graph. using gnuplot 5 , played around pointsize, doesn't reduce distance anymore. hope can help! edit: set terminal pdf set output 'dat.pdf' file0 = 'dat1.dat' file1 = 'dat2.dat' file2 = 'dat3.dat' set pointsize 0.2 set notitle set xlabel 'x' set ylabel 'y' header = system('head -1 '.file0); n = words(header) set xtics ('' 1) set [i=1:n] xtics add (word(header, i) i) set style data boxplot plot file0 using (1-0.25):1:(0.2) boxplot lw 2 lc rgb '#8b0000...
Read more

cakephp - simple blog with croogo -

i not problem, made simple blog in croogo, problem is not adding or modifying or delete, because arabic language ?? function add in controller `public function admin_add() { $this->set('title_for_layout', __('add part')); if (!empty($this->request->data)) { $this->part->create(); if ($this->part->save($this->request->data)) { $this->session->setflash(__('the part has been saved'), 'default', array('class' => 'success')); $this->redirect(array('action' => 'index'));//, $this->part->id)); } else { $this->session->setflash(__('the part not saved. please, try again.'), 'default', array('class' => 'error')); } } }` => model `class part extends appmodel { public $name = 'part'; var $belongst...
Read more